Tuesday
May 21, 2013

# Homework Help: Math: Trigonometry

Trig/Math
2. f(x) = 1/4 cos(1/2 x + pi/2). Find the amplitude, period, and phase shift of the function. 3. f(x) = -cos(3x + pi). Find the amplitude, period, and phase shift of the function.
Monday, January 10, 2011 at 5:47pm

Trig
2.Graph f(x) = 1/4 cos(1/2 x + pi/2). Find the amplitude, period, and phase shift of the function. 3. Graph f(x) = -cos(3x + pi). Find the amplitude, period, and phase shift of the function.
Monday, January 10, 2011 at 5:14pm

Trig
4. Write the equation of the cosine function with an amplitude of 1/3, a period of 2pi, and a phase shift of 3pi/2. 5. Write the equation of the sine function with an amplitude of 4, a period of pi/2, and a phase shift of -pi/4.
Monday, January 10, 2011 at 4:59pm

Prove trig identity
Prove the following trigonometric identity: (sec^2x-1)(csc^2x-1)=1
Sunday, January 9, 2011 at 3:01pm

trig
prove that :tan20 tan30 tan40 =tan10
Thursday, January 6, 2011 at 2:08pm

trig
what is the value of the discriminant x^2-9
Wednesday, January 5, 2011 at 12:09pm

trig
from the intervals 0 less than or equal to theda less than 2 pie, what is cot theda of 2
Tuesday, January 4, 2011 at 10:08pm

Math/Trig
Which of the following is coterminal with ? A)-237 B)33 C)-33 D)597
Tuesday, January 4, 2011 at 1:03pm

Math/Trig
Determine the period of the function: f(x)=3sin1/2x+2
Tuesday, January 4, 2011 at 1:02pm

Math/Trig
Find two exact values of sin(cos­­ˉ¹ √5/6)
Tuesday, January 4, 2011 at 12:56pm

Math/Trig
Tuesday, January 4, 2011 at 12:51pm

Math/Trig
If the population of rabbits in a certain area is modeled by the function, r=10,000cos(pi/12t)+35,000 where t is the time in months, approximately how many rabbits will there be in August (January is equal to t = 1)?
Tuesday, January 4, 2011 at 12:47pm

Math/Trig
Write the sine function with an amplitude of 1/4, a period of 3pi, phase shift of pi4 to the right, and a vertical shift of 4 units down.
Tuesday, January 4, 2011 at 12:43pm

Math/Trig
State the amplitude, period, phase shift, and vertical shift of f(x)=-1/4sin(6x+2pi)+9
Tuesday, January 4, 2011 at 12:27pm

Trig, Math
State the amplitude, period, phase shift, and vertical shift of f(x)=2cos(1/2x-pi/6)-1/3
Tuesday, January 4, 2011 at 12:21pm

Math/Trig
Write an equation for a cosine function with an amplitude of 2/3 , a period of pi, and a vertical shift of 2 units up.
Tuesday, January 4, 2011 at 12:33am

Trig
Determine the period of the function: f(x)=3sin1/2x+2 ?
Tuesday, January 4, 2011 at 12:31am

RE: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) Thanks for your help, sorry I posted 3 times, I thought you didn't understand what I needed. I really do appreciate your time spent. just for your FYI, if you are ...
Monday, January 3, 2011 at 8:36pm

trig
Third time is the charm? I'll try again. Could someone show me how, (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) TIA Carol This doesn't require the solving of any equations. For example, ( same concept for what I ...
Monday, January 3, 2011 at 6:45pm

trig
I asked below but I guess it was not understood what I was asking. I'll try again. Could someone show me how, (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) TIA Carol I know the half-angle formulas are used but I cannot...
Monday, January 3, 2011 at 5:30pm

Trig
Could someone please show me how 1 / ( 4 tan (x/2) + 2 ) is converted to: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) TIA Carol
Monday, January 3, 2011 at 3:58pm

Trig
Write the equation of the sine function with an amplitude of 1/7, a period of 2pi, a phase shift of 6pi, and a vertical shift of 10 units up ?
Monday, January 3, 2011 at 12:26am

trig
Write the equation of the sine function with an amplitude of, a period of, a phase shift of, and a vertical shift of 10 units up.
Monday, January 3, 2011 at 12:17am

Pre Calc , Math
Find the 6 Trig ratios of -7Pie/3
Sunday, January 2, 2011 at 9:50pm

trig
verify : [sec(x) / csc(x) - cot(x)] - [sec(x) / csc(x) + cot(x)] = 2csc(x)
Sunday, January 2, 2011 at 4:58pm

Trig
Friday, December 31, 2010 at 11:06pm

Trig
Friday, December 31, 2010 at 10:31pm

math
what is 7-2i in trig form? and if u=3j and v=7i+j what is the dot product of u times v dont get this one because there are no i terms for u thanks
Thursday, December 30, 2010 at 11:00am

trig
find the exact values of THE SIX TRIGONOMETRIC FUNCTIONS OF THE ANGLE THETA WHICH HAS A POINT ON THE TERMINAL SIDE OF (-1,4)
Tuesday, December 28, 2010 at 11:24pm

trig
Simplify the expression cotx divided by secx
Wednesday, December 22, 2010 at 8:49am

trig
How do you write the quadratic equation with integer coefficients that have the roots 7-3i and 7+3i?
Tuesday, December 21, 2010 at 5:33pm

trig
a plane flies due east for 500 km. and then turns on a heading of 120 degrees for 150 km. What are its distance and bearing from its starting point?
Monday, December 20, 2010 at 11:10pm

trig
Find the value of secant theta for angle theta in standard position if a point with coordinates (-3/4) lies on its terminal side
Monday, December 20, 2010 at 10:33pm

trig
Find the value of secant theta for angle theta in standard position if a point with coordinates (-3/4) lies on its terminal side
Monday, December 20, 2010 at 10:18pm

trig
what is the amplitude, period and phase shift of y= 8cos (x-90)
Monday, December 20, 2010 at 10:15pm

trig
Points A and B are 150 m apart on one bank of a river. Point C is on the other bank of the river. The line of sight distance from A to C forms an angle and 28 degrees with the AB side of the river bank and the line of sight distance form B to C forms an angle of 56 degrees ...
Sunday, December 19, 2010 at 7:46pm

trig
How would i solve this equation in Radians: cosx + sinx = 0
Sunday, December 19, 2010 at 1:55pm

Trig
An airplane is flying on a compass heading (bearing) of 340 degrees at 325 mph. A wind is blowing with the bearing 320 degrees at 40 mph. Find the component form of the velocity of the airplane. then find the actual ground speed and direction of the plane
Friday, December 17, 2010 at 9:44am

trig
triangle has sides 200,172 and155 find area
Thursday, December 16, 2010 at 1:13pm

trig
prove the identity: csc x-1/csc x+1 = cot^x/csc^x+2 csc x+1
Thursday, December 16, 2010 at 9:54am

trig
If a and b are the measures of two first quadrant angles and sin a = and sin b = , find sin (a + b).
Tuesday, December 14, 2010 at 8:45am

Trig
How do you convert rectangular equations into polar equations? If x4−y4=xy , then r2=atan(b); What is a? What is b?
Monday, December 13, 2010 at 11:47pm

Trig
A curve with polar equation r=(8)/7sinx + 36cosx represents a line. This line has a Cartesian equation of the form y=mx+b ,where m and b are constants. Give the formula for y in terms of x . For example, if the line had equation y=2x+3 then the answer would be 2x+3 .
Monday, December 13, 2010 at 11:13pm

trig
Hank rides 2 hours total on a bicycle trip into the country and back. He rode out at the rate of 20 mph and returned at the rate of 24 mph. How far into the country did Hank ride
Sunday, December 12, 2010 at 11:52pm

precalculus
how you do you use the power-reducing formula to find the exact value of the trig function: sin^2(37pi/12)
Sunday, December 12, 2010 at 10:51pm

trig
simplify cos(30+x)+cos(30-x)
Saturday, December 11, 2010 at 10:28pm

trig
the height of a projectile is modeled by the equation y=-2x^2+38x+10, where x is a time, in seconds, and y is height, in feet, During what interval of time, to the nearest tenth of a second, is the projectile at least 125 feet above ground
Friday, December 10, 2010 at 2:10pm

trig
sin2 theta = cos theta, 90 degrees less than or equal to thetha greater than 180 degrees
Friday, December 10, 2010 at 1:45pm

Trig
a student says there can only be 360 different rays emanating from a point since there are only 360 degrees in a circle. Is this true? Why or Why not?
Friday, December 10, 2010 at 12:28am

trig
find the exact value of cos 3.14/8
Thursday, December 9, 2010 at 3:24am

trig
solving radical equations... help! 5+¡în+1= n+4
Wednesday, December 8, 2010 at 6:35pm

Trig
How do I do this? I punch the numbers into my calculator, and they don't work. B=sin^-1 (12/7 sin42\[Degree])
Wednesday, December 8, 2010 at 5:40pm

math(trig)
1) What's the linear velocity of a point on the tip of a 6-ft propeller turning at 1200 revolutions per min? 2) A gear is driven by a chain that travels 90m/min. Find the radius of the gear if it makes 50 revolutions per minute.
Monday, December 6, 2010 at 8:30pm

math(trig)
1) A 6-ft propeller turns at 1200 revolutions per minute. Compare the angular velocity of the tip with the angular velocity at a point 10 in. from its center. 2) What is the angular velocity of a point on the tread of a 15-in. diameter tire on a car traveling 55 mph?
Monday, December 6, 2010 at 8:25pm

trig
prove cosx+cotx/secx+tanx =cosxcotx
Friday, December 3, 2010 at 12:00am

Precalculus
I've tried many times to get the equation to balance using trig identities like half-angle formulas, power-reducing formulas, and double angle formulas, but I couldn't get the equation to equal out. I only need to work one side to make it equal to the other, like a ...
Thursday, December 2, 2010 at 10:11pm

trig
Find altitude of isosceles triangle if angle=53 degrees (the equal angles) and the base is 8 inches.
Thursday, December 2, 2010 at 7:21pm

Pre- cal Trig
2cos^2x=cosx. Can you subtract the cos from cos^2? Or what would i have to do?
Thursday, December 2, 2010 at 6:01pm

trig
solve: 1/m=m-34/2m^2
Wednesday, December 1, 2010 at 11:47pm

Trig/algebra2
Wednesday, December 1, 2010 at 8:53pm

Trig/algebra2
Wednesday, December 1, 2010 at 8:37pm

trig
Find the sign of the expression if the terminal point determined by t is in the given quadrant. cos t X sec t in any given quadrant
Wednesday, December 1, 2010 at 10:28am

trig
the terminal side of an angle theta in standard position coincides with the line y=5x and lies in quadrant 3. find the six trigonometric functions of theta.
Monday, November 29, 2010 at 6:56pm

Math - derivative of sinusoidal (check)
a) Find a function y=f(x) that satisfies the differential equation dy/dx = fifth derivative. This is one of the questions in my practice test, I tried the basic equation of the trig function such as f(x)= sin(x) or f(x)=-sin(x) however in the fourth derivative they reach the ...
Monday, November 29, 2010 at 5:53am

trig
Find the values of the six trigonometric functions of the angle in standard position with the terminal side passing through the point P(-4, 3).
Sunday, November 28, 2010 at 7:23pm

trig
Use the double angle formula to verify the identity cotxsin2x=1+cos2x
Sunday, November 28, 2010 at 5:47pm

Trig
Find the value of tangent of angle A, given cos2A = 4/5, and A terminates in quadrant 2
Sunday, November 28, 2010 at 5:46pm

Trig
find sin(s+t), given that sin t=1/3, t in quadrant 2, and cos s = -2/5, s in quadrant 3
Sunday, November 28, 2010 at 5:45pm

Trig
the angle of depression from the top of a building to a point on the ground is 32degrees30', how far is the point of the ground from the top of building if the building is 252m high?
Sunday, November 28, 2010 at 5:44pm

Trig
The angle of depression from the top of the building to a point on the ground is 29degrees30', the point of the ground is 36 meters from the top of the building. Find the height of the building
Sunday, November 28, 2010 at 5:43pm

Trig
A plane flies 1.3 hr at 100mph on a bearing of N40degreesE. It then turns and flies 1.5hr at the same speed on a bearing of S50degreesE. How far is the plane from its starting point?
Sunday, November 28, 2010 at 5:41pm

Trig
A ship leaves its homeport and sails on a bearing of N28degrees10'E. Another ship leaves the same port at the same time and sails on a bearing of S61degrees50'E. If the first ship sails at 24.0 mph and second sails at 28mph, find the distance between the two ships ...
Sunday, November 28, 2010 at 5:39pm

Trig
assume a pulley has a radius of 12.96 cm. If it takes 18 seconds for 56 cm of belt to go around the pulley, find the angular velocity in radians per seconds
Sunday, November 28, 2010 at 4:52pm

TRIG
Sketch the graphs of y=cos 2x and y= -0.5 over the domain -pi<x<pi. use an algebraic method to determine the values of x where these two graphs intersect. use exact value. Please help me work this problem out! I sketched the graph, just not sure how to set up the ...
Friday, November 26, 2010 at 4:37pm

TRIG
what is another form of: sin (A+B) sin (A-B)/ cos^2 A cos^2 B a) cos^2 A - cos^2 B b) tan^2 A - tan^2 B c) tan^2 A - tan^2 B d) sin^2 A - sin^2 B please show the steps you take to get to the answer! thank you
Friday, November 26, 2010 at 4:35pm

TRIG
If cos theta= -sin theta, then sin^2 theta is? a) 1/4 b) 1/2 c) sqrt2/2 d) - sqrt 2/2 please show me how you got the answer! thank you!
Friday, November 26, 2010 at 4:33pm

TRIG
what is the exact value of sin^2 pi/6-2 sin pi/6 cos pi/6 +cos^2 (-pi/6)? a) 2- sqrt 3 b) 2- sqrt 3/ 2 c) 2+ sqrt 3/2 d) 2+ sqrt 3 I am not sure how to work this out and would appreciate you how to show me the process. Thank you in advanced!!!!!!!
Friday, November 26, 2010 at 4:33pm

Algebra 2 with Trig
what is the index of three with the square root of negative 432
Monday, November 22, 2010 at 7:18pm

trig
In ΔXYZ, ∠X=47° and ∠Y=29°. ∠XWZ=90° and XY=3.9. Find the length of WY to the nearest 100th.
Saturday, November 20, 2010 at 8:39pm

trig
graphs of trignometry
Saturday, November 20, 2010 at 6:07am

trig
find exact value cos(13pi/15)cos(-pi/5)-sin(13pi/15)sin(-​pi/5)
Thursday, November 18, 2010 at 10:33pm

trig
find exact value using sum or differnce equations. tan(19pi/12)
Thursday, November 18, 2010 at 9:52pm

Trig math
how to split up using sum and difference identities cos (13pi/12) PLeaseeeeeeeeeee help!!! thanx a million
Wednesday, November 17, 2010 at 12:56am

trig
sin(pi/3)
Tuesday, November 16, 2010 at 4:58pm

Trig
Simplify: (cosx + cos2x + cos3x + cos4x + cos5x + cos6x) / (sinx + sin2x + sin3x + sin4x + sin5x + sin6x) into a single Cotangent function. Using the sum-to-products, I was able to get remove some of the addition in attempts to get full multiplication, but I could not get the ...
Tuesday, November 16, 2010 at 11:59am

trig
secant theta = square root of seven over two and cosecant theta is less than zero
Monday, November 15, 2010 at 9:10pm

trig
what is the classified given angle of 177 degrees?
Friday, November 12, 2010 at 4:36pm

trig
exact value of cot[arccos(-2/3)]
Thursday, November 11, 2010 at 4:51pm

Trig
What expression represents the same value as sin 19(degrees)?
Thursday, November 11, 2010 at 2:26pm

trig
let sin theta = -7/25 with theta in QIV find sec (2theta)
Thursday, November 11, 2010 at 11:34am

Trig
tan^2t/sect=sect-cost cott^2/csct=csct-sint
Thursday, November 11, 2010 at 5:55am

What are the period and 2 consecutive asymptotes? 1. y= -3tan pi x 2. y= 2 sec 4 x 3.y= csc x/3 4.y = 3cot pi x/3
Wednesday, November 10, 2010 at 10:09am

Trig math
PLEASEE HELPPMEEE!!!! cot2x+sec2x=tan2x+csc2x and 1+2sinxcosx/sinx+cosx=sinx + cosx
Tuesday, November 9, 2010 at 10:10pm

trig. identities
Tuesday, November 9, 2010 at 7:07pm

Alg & Trig 2
find the sum of 1/2, 2/7x, and 5/x
Friday, November 5, 2010 at 7:11am

Alg & Trig 2
find the sum of 1/2, 2/7x, and 5/x
Friday, November 5, 2010 at 6:07am

Math: Calculus
Can someone help me out here with these two problem? I have know idea where to start. 1)The equation: 10(x-1)(x-2)(x-3)=1, has three real solutions a<b<c where a=____, b=___ , and c=___. Enter your answers with at least six correct digits beyond the decimal point. Hint: ...
Thursday, November 4, 2010 at 5:12pm

Math: Calculus
Find the smallest positive value of which satisfies -- x=4.100cos(2.800x) Give the answer to four places of accuracy._________ Remember to calculate the trig functions in radian mode.
Thursday, November 4, 2010 at 4:28pm

trig
A plane climbs into the jet stream which is flowing at a rate of 80 miles per hour. It travels with the jet stream for 5 hours and then reduces its altitude, flying out of the jet stream for 4 more hours. The plane, while out of the jet stream, covered 550 miles less than it ...
Thursday, November 4, 2010 at 11:12am

trig
3tan(3x) = sqrt(3) Solve the equation for exact solutions of the interval [0,2pi).
Thursday, November 4, 2010 at 1:42am

college
Trig help... equation on the interval [0,2pi]? 2sin^2(x)=sin(x)
Wednesday, November 3, 2010 at 11:25pm

trig
sec(sq) X - Sec(sq) X * Sin (sq) X = 1
Wednesday, November 3, 2010 at 7:00pm

trig
A bicyclist is riding at 15 mph and her bike has wheels with a radius of 14 inches. She rides over a wad of gum which sticks in the tire. Assume this is t=0 seconds. a.)Find a function that gives the height in inches above the ground of the gum, with the input in seconds. Also...
Wednesday, November 3, 2010 at 6:31pm

math Trig
find each ratio to 3 decimal places cot245degrees sec74degrees how do i do this?
Wednesday, November 3, 2010 at 8:23am

trig
cotx/secx-tanx
Tuesday, November 2, 2010 at 9:25pm

trig
the shadow of a tower is 2y meters longer at 30 degree than when it was at 45 degree. find the height of the tower
Tuesday, November 2, 2010 at 9:08am

trig
evaluate the expression: cot 270 + 8 cos 180 + 5 sec2-360
Monday, November 1, 2010 at 4:09pm

trig
If a=8, the angle C=50 degrees and the angle A=35 degrees find the other angle B and the remaining b and c sides. Give your answer to at least 3 decimal places.
Friday, October 29, 2010 at 7:40pm

AP calculus BC
hello i know that deriv(cscx) = -cscxcotx and that deriv(cos) = -sinx deriv(cotx) = -((cscx)^2) my question is: is this (statements below) correct? antideriv(cscxcotx) = -(cscx) antideriv(sinx) = -cosx antideriv((cscx)^2)= -cotx were those antiderivatives above correct? ALSO ...
Wednesday, October 27, 2010 at 5:27pm

trig
Find the values of the trigonmeric functions of t from the given information cos t = -4/5 terminal point of t is in quadrant III
Tuesday, October 26, 2010 at 3:47pm

trig
if sin theta = 2/3 in quadrant 1, find sec theta. HELP!!!
Tuesday, October 26, 2010 at 1:14pm

trig
Rewrite the expression in terms of the first power of the cosine. Use a graphing utility to graph both expressions to verify that both forms are the same. 5 sin6(x)
Monday, October 25, 2010 at 8:29pm

trig
determine an exact expression for the trigonometric function sin(13pi/12).
Monday, October 25, 2010 at 4:15am

trig
suppose sin(x)=4/5 and cos(y)=-12/13, and x and y are in the second quadrant. determine the value of each expression: sin(x+y), cos(x-y), cos2x, sin2y.
Sunday, October 24, 2010 at 11:23pm

trig
prove this (1+cosx)/(1-cosx)=(1+secx)/(secx-1)
Sunday, October 24, 2010 at 5:53pm

trig
suppose sin(x)=5/6, and x is in the first quadrant. Determine cos(x), sin(2x), and cos(2x).
Sunday, October 24, 2010 at 2:50pm

trig
Suppose that sin x = 1/5 and cos y = 2/3, and x and y are each angles in Quadrant 1. Determine sin(x+y).
Friday, October 22, 2010 at 8:48pm

College Algebra
I REALLY don't understand the reason/basis/use of logarithms. I have listened to my teacher, who never is clear on much of anything (it would help if he spoke better English), and a more advanced student, who couldn't explain them to me. The problem I am working on is...
Thursday, October 21, 2010 at 10:54am

trig
how do you establish the identity of cos(3pi/2+0)=sin0
Thursday, October 21, 2010 at 10:44am

trig
If sinθ>0 and tangθ<0, explain how to find the Quadrant in which θ lies.
Thursday, October 21, 2010 at 2:18am

Math 12
trig question 2sin^2x+sinx-6=0 how to solve for x when the restriction is x is greater than or equal to zero but less than 2pi
Thursday, October 21, 2010 at 12:55am

pre calc trig check my work please
sin x + cos x -------------- = ? sin x sin x cos x ----- + ----- = sin x sin x cos x/sin x = cot x this is what i got, the problem is we have a match the expression to the equation work sheet and this is not one of the answers. need to figure out what im doing wrong so i can ...
Wednesday, October 20, 2010 at 11:32pm

trig
if 8 tan Q=15 then sinA-cosA=?
Wednesday, October 20, 2010 at 11:22am

Trig
A force of 323 newtons makes an angle of 54 degrees and 20 minutes with a second force. The resultant of the two forces makes an angle of 39 degrees forty minutes with the first force. Find the magnitude of the second force. I have the answer, 814.3022, but I need to know how ...
Tuesday, October 19, 2010 at 11:30pm

trig
how do i find six trig functions for cos(pi over 2-x)=3/5, cos x=4/5?
Tuesday, October 19, 2010 at 11:28pm

Trig
Tuesday, October 19, 2010 at 12:16am

Trig
Solve for 0≤x≤2π ---> (2√2)cos²(x)-(√2-2)cos(​x)-1=0 much thanks .
Monday, October 18, 2010 at 11:46pm

Trig
Find the general solution for the equation 4tanx+cotx=5?????? and the steps please? THANYOO!
Monday, October 18, 2010 at 11:07pm

Trig
If b=5 , the angle C=50 and the angle A=50 find the other angle B and the remaining sides and . Give your answer to at least 3 decimal places.
Monday, October 18, 2010 at 7:58pm

trig
f(x)= 2sec(x-3.14/4)-1
Monday, October 18, 2010 at 2:52pm

trig
find all values of degrees in the set (o,2 pi) satisfying cos of degree over 3 equal to square root of 3 over two and -cosdegree + 2sindegres=-2
Sunday, October 17, 2010 at 7:43pm

trig
prove that cos 52 + cos 68 + cos172 = 0
Sunday, October 17, 2010 at 2:13am

trig
how to do the calculation while taking 'A' as 15 in the half angle formula used for calculating the value of sin 7.5 ?
Sunday, October 17, 2010 at 2:05am

trig
a hedgehog wishes to cross a road without being run over. he observes the angle of elevation of a lamp post on the other side of the road to be 27 degrees from the edge of the road and 15 degrees from a point 10m back from the raod. How wide is the road??
Saturday, October 16, 2010 at 4:00pm

trig
given cosine (-2/5) and pie<t<(3pie/2) find sine (2x-1)
Friday, October 15, 2010 at 12:54pm

trig
wha tis the exact value of sin 9pi/4
Thursday, October 14, 2010 at 2:39pm

College Algebra and Trig
a rancher has 12,000 feet of fence to enclose 5 adjacent pens. determine the outer rectangular dimensions that result the maximum enclosed area.
Thursday, October 14, 2010 at 1:05pm

Calculus....
can you show me how to maniplate this using Trig subtitution... integral dx/4+x^2 x is bounded on [-2, 2]
Tuesday, October 12, 2010 at 11:24am

trig
Find the graph y = 2sin x + cos(2.5x) over the interval
Tuesday, October 12, 2010 at 1:53am

trig
What is the graph of y = 3 sin (3x + 180)?
Tuesday, October 5, 2010 at 9:54am

Trig
Find the value of the six trigonometric functions. t = 7(pi)/4 Can you show me step by step so I can see how this is solved? Also, do I need to graph this first in order to understand or begin the problem? I am trying to self teach - but having problems.
Tuesday, October 5, 2010 at 12:12am

Trig
Find the reference number and the terminal point determined by t. a. t = - 7(pi)/6
Tuesday, October 5, 2010 at 12:09am

college trig
I need to find the domain of the following function: y=arcsin((x-3)/(2x+1)) My math is a bit rusty after holidays...This is what I did: (I'll use <> for the sign of 'not equal') -> 2x+1<>0 <=> 2x<>-1 <=> x <> -1/2 But i'm ...
Monday, October 4, 2010 at 5:08pm

Maths - trig
Solve 3cos2x - 7cosx = 0, when 0<=x<=360 And also, find the exact values for x when 0<=x<=360 if 3tan^2x=1 Thankyou!
Sunday, October 3, 2010 at 5:37pm

trig
how do you solve: find cos2x if sinx is equal to 1/5
Saturday, October 2, 2010 at 11:57am

trig
How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!
Friday, October 1, 2010 at 12:38pm

trig
25q to the second power -81=0
Tuesday, September 28, 2010 at 6:40pm

trig
The angle of elevation from the top of a house to a jet flying 2 miles above the house is x radians. If d represents the horizontal distance, in miles, of the jet from the house, express d in terms of a trigonmetric function of x.
Sunday, September 26, 2010 at 6:16pm

trig
which ser of lenths will form a triangle with greater area? 6ft,8ft, 10ft or 6ft,8ft,12ft...
Saturday, September 25, 2010 at 9:33pm

trig
4=log[7]2401
Saturday, September 25, 2010 at 11:38am

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