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July 22, 2014

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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Trig/PreCalc
Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. ...
Friday, April 13, 2012 at 3:44pm

Trig
How do i find the exact value of sin 15 using the half angle formula
Friday, April 13, 2012 at 3:17pm

Trig
can I please have help with these 3 questions? 1. Solve this equation graphically on the interval [0, 2ð]. list the solutions. sin(2x)-1=tan x 2. solve sin x cos x= sqrt3/4 3. solve tan^2 x-3tan x+2=0 thank you! show step by step please.
Friday, April 13, 2012 at 2:02am

algebra-trig help ASAP
Can someone please help me understand how to graph y=3cos(x/4)-5
Thursday, April 12, 2012 at 2:58pm

algebra-trig
Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.
Thursday, April 12, 2012 at 1:19pm

algebra-trig
Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.
Thursday, April 12, 2012 at 1:19pm

Math - Trig
A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? I just can't figure it out.
Wednesday, April 11, 2012 at 12:22pm

microsoft excell 2007
entering the formula=SUM(C5:C18)is cell C19 will resolve in which of the following? (a)cells C5 and C18 will be added together (b)cells C5 and C18,and C19 will be added together (c)the total of cells C5 to C19 will appear in cell C19 (d0the total of cells C5 to C18 will appear...
Wednesday, April 11, 2012 at 10:34am

microsoft excell 2007
when working with predefined formulas in excel,what category contains the boolean functions? (a)math and trig (b)recently used (c)logical (d)auto sum my answer is c debbie needs to print her table.which of the following is not an excel print program? (a)title (b)table (c)...
Wednesday, April 11, 2012 at 6:53am

trig/precalc
a car's flywheel has a timing mark on it's outer edge. the height of the timing mark on the rotating flywheel is given by y=3.55sin[x - (pi/4)]. graph one full cycle of this function. I was not taught how to graph a function like this, only the simple y= sin x and y= ...
Tuesday, April 10, 2012 at 6:07pm

Trig
Rewrite 7pi/5 in degrees.
Tuesday, April 10, 2012 at 3:17pm

trig
solve the equation of the domain 0¡Ü¦È¡&Uu​ml;2¦Ð 3cos^2theta - 5costheta -1 = 3sin^2theta
Monday, April 9, 2012 at 10:29pm

Trig
A ferris wheel has a 14 meter diameter and turns counterclockwise at 6 rpm. a) Assuming that the center of the wheel is the origin of an x-y coordinate plane, write functions to find the position (x,y) of a rider that starts at the bottom of the wheel. b) Where is the rider 2 ...
Sunday, April 8, 2012 at 7:54pm

Trig
Find the supplement of pi/6
Sunday, April 8, 2012 at 6:58pm

Trig-desperate
f(x)=sin2x and g(x)=1/2tanx for x is the element of [-90;180] 8.1)calculate the x-coordinates of the points of intersection of f and g.
Sunday, April 8, 2012 at 5:24am

TRIG
Factor 4cos^2x+4cosx-1=0
Saturday, April 7, 2012 at 7:19pm

Trig
Factor 4cos^2x+4cosx-1=0
Saturday, April 7, 2012 at 7:04pm

Trig
What is the supplement of 3pi/5?
Saturday, April 7, 2012 at 3:28pm

Trig
Complete the following statement. (1-sinθ)(1+sinθ)
Saturday, April 7, 2012 at 3:20pm

Trig
Find the co terminal angle for 15pi/4
Saturday, April 7, 2012 at 2:44pm

Trig
19pi/7 Which quadrant does the terminal side lie on?
Saturday, April 7, 2012 at 2:06pm

Trig-help please
Sin23=p write cos113 in terms of p
Friday, April 6, 2012 at 1:33am

Trig Help Please!!!
Find the indicated angle è. (Use either the Law of Sines or the Law of Cosines, as appropriate. Assume a = 95 and c = 137(angle B=38). Round your answer to two decimal places.)
Thursday, April 5, 2012 at 11:43pm

trig
if one of a quadratic equation is 1/2-2i, what is the equation. the other root is 1/2+2I but i dont know how to find the equation
Thursday, April 5, 2012 at 11:02pm

trig
if sin2x=3sin2y, find 2tan(x-y)
Thursday, April 5, 2012 at 10:17pm

alg2/trig
If 4x^2+9=kx, what value of k will produce equal roots? the answer is 12 but i dont understand how you get it, please help!
Thursday, April 5, 2012 at 10:07pm

Trig.
Find to the nearest degree, all values of ө less than 360˚ that satisfy the equation 2tan^2θ-2tanθ=3
Thursday, April 5, 2012 at 8:48pm

Trig.
What is the trigonmetric fact for sin 3.14/8?
Thursday, April 5, 2012 at 11:39am

trig
simplify cox^2x-cos^4x
Thursday, April 5, 2012 at 11:30am

trig
Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
Thursday, April 5, 2012 at 8:44am

trig
Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
Thursday, April 5, 2012 at 8:43am

trig
If sin A= 1/4 and sin B= -1/2, with A in QII and B in QIV, find tan(A+B)
Thursday, April 5, 2012 at 12:08am

Trigonometry
I'm having a lot of trouble with graphing trig functions. Can anyone tell me how to graph this equation on a graphing calculator? Sketch the graph of y= sin x in the interval 0 ≤ x ≤4π
Tuesday, April 3, 2012 at 6:25pm

trig
what is the amplitude of f(X)=-6sin(3x-7)
Tuesday, April 3, 2012 at 12:11pm

trig
cos(sin^-1 x)=sq rt(1-x^2) prove the identity
Monday, April 2, 2012 at 3:57pm

trig
2cos^2 22.5-1 (find exact value)
Monday, April 2, 2012 at 12:47pm

Trig
1)y=1-tan(3pi-2x) Find period and phase shift 2)y=-sin(5x+3) Find amplitude,period,and phase shift 3)y=1-sin(3pi-2x)Find amplitude,period,and phase shift 4)y=2csc(2x-1)Find period and phase shift 5)Given the graph of y = sin (x), what transformation can be made to make the ...
Sunday, April 1, 2012 at 9:04pm

Trig
y=sin(2pi*x-pi) find the amplitude, period, and phase shift
Sunday, April 1, 2012 at 8:59pm

Trig
y=sec(2x+1) Find the period and phase shift. Sorry i'm really bad at these.
Sunday, April 1, 2012 at 8:50pm

Trig
y=2tan(x-1) Find the period and phase shift.
Sunday, April 1, 2012 at 8:47pm

trig
Give the following for the function: y=2+cos(5x+3.14 Amplitude: Period: Phase Shift:
Sunday, April 1, 2012 at 7:29pm

Trig
A 7.25 inch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.
Sunday, April 1, 2012 at 6:20pm

Trig
A carousel with a 50-foot diameter makes 4 revolutions per minute. a) Find the angular speed of the carousel in radians per minute. b) Find the linear speed in feet per minute of the platform rim of the carousel.
Sunday, April 1, 2012 at 6:19pm

Trig.
Josh kicks a soccer ball with an initial velocity of 18 feet per second out of a window from a height of 12 feet. The function h(t)= -16t^2+18t+12 represents the height of the soccer ball after t seconds.What is the domain of this function in the context of this problem?
Sunday, April 1, 2012 at 2:17pm

Trig
Why does 11.4(7pi/18)=133pi/30 ?
Sunday, April 1, 2012 at 12:12pm

Trig
Solve the equation 2sin(2x) = cos x. and Solve the equation cos^2(2x)–sin^2(2x)= (√3 / 2).
Sunday, April 1, 2012 at 1:13am

Trig
Use the half-angle formulas to come up with an exact expression for each function value below. You do not have to simplify your answers. cos(pi/16)
Sunday, April 1, 2012 at 1:09am

Trig Circular Motion
A es004-1.jpginch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.
Saturday, March 31, 2012 at 4:45pm

Trig
A ferris wheel at the fair has a radius of 60 feet. If it takes 24 seconds to make a full revolution, what is the linear speed for the passengers?
Saturday, March 31, 2012 at 4:44pm

trig
2sin^2x-1=0[0,2pi)
Thursday, March 29, 2012 at 10:59am

Geom./Trig.
an airplane flies directly overhead at 540mph. 1 minute later is seen at an angle of elevation of 34 degrees. how far did the airplane fly during that time? what is the elevation of the plane?
Wednesday, March 28, 2012 at 5:20pm

TRIG
IF Y=5+7C0S 4(0-7). FIND YWHEN 0=42 DEGREES. SMALLEST POSITIVE VALUE OF 0 FOR WHICH Y=1.5
Wednesday, March 28, 2012 at 11:58am

trig
Two tracking stations are on the equator 134 miles apart. A weather balloon is located on a bearing of N 38°E from the western station and on a bearing of N 19°E from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
Wednesday, March 28, 2012 at 11:26am

trig
Find the other endpoint of the line segment with the given endpoint and mid point. 1. Endpoint:(-1, 9), midpoint: (-9, -10) 2. Endpoint: (2, 5), midpoint: (5, 1) 3. Endpoint:(9, -10), midpoint: (4, 8)
Wednesday, March 28, 2012 at 9:49am

trig
prove: cot^2(x)=cos(x)/(sinx)(tanx)
Monday, March 26, 2012 at 9:26pm

algebra-trig help asap
An isosceles triangle has a base 22 cm long and a base angle of 72 degrees. Find its perimeter.
Monday, March 26, 2012 at 7:50pm

trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
Monday, March 26, 2012 at 11:20am

trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
Monday, March 26, 2012 at 11:10am

trig
How do I prove : 4sinAcosAcos2Asin15 all over. :sin2A(tan225-2sinsquared A)is equal to. :root 6 - root 2 over 2
Monday, March 26, 2012 at 7:44am

trig
Prove: sin(x–y)sin(x+y)=sin^2(x)–sin^​2(y)
Monday, March 26, 2012 at 1:09am

calculus
need help simplifying some trig identities such as: (csc t) (sin t) cos t = 0.75 and tan t = 0.88, find sec t and cot t; (cot2t) (sin2t) + sin2 t; csc2t - cot2t/sin2t
Sunday, March 25, 2012 at 9:15pm

trig
Prove: (tan x+sec x)^2 = 2sec^2(x)+2tan(x)secx-1
Saturday, March 24, 2012 at 5:10pm

trig
Prove (cscx+cotx)(cscx-cotx)=1
Saturday, March 24, 2012 at 4:10pm

Trig
Prove: (cotx sinx)(secx-cosx)=sin^2(X)
Saturday, March 24, 2012 at 3:03pm

trig
What is cosx=1/2?
Thursday, March 22, 2012 at 3:43pm

Trig
As you ride a ferris wheel, your distance from the ground varies sinusoidally with time. When the last passenger boards the ferris wheel and the ride starts moving, let your position be modeled by the diagram provided. Let t be the number of seconds that have elapsed since ...
Thursday, March 22, 2012 at 12:43pm

trig
Solve for theta, giving a general formula for all of the solution: tan(theta)=-1 sin(theta/2)=1/2
Thursday, March 22, 2012 at 12:28pm

Trig
4sin^(2)x-3=0
Wednesday, March 21, 2012 at 9:08pm

Trig
cos(3x)=-1
Wednesday, March 21, 2012 at 9:02pm

Trig
Solve Sinx=Cos2x-1 for all values between 0 and 2pi
Wednesday, March 21, 2012 at 4:34pm

trig
Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help
Wednesday, March 21, 2012 at 12:57am

trig
Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help
Wednesday, March 21, 2012 at 12:57am

trig
If theta is a standard position angle and cot theta = 1.85, in which quadrant(s) could theta lie?
Tuesday, March 20, 2012 at 3:50pm

trig
if tan(θ)=√(33) / 4 (√ does not ride over 4) find sin(θ)<0 i would just like to know the steps of how to do it.
Tuesday, March 20, 2012 at 3:33pm

trig
What would be the force required to push a 100-pound object along a ramp that is inclined 10 degrees with the horizontal?
Monday, March 19, 2012 at 7:08pm

trig
if sin theta equals 3/7, what is tan theta?
Monday, March 19, 2012 at 4:12pm

trig
howard and keight who are 2km apart are on a horizontal plane observe a balloon in the same vertical plane with themselves the angles of elevation are 50 degrees and 65 degrees respectively find the height of the balloon. A.if its situated between howard and keight B.If it is ...
Monday, March 19, 2012 at 7:03am

trig
verify that 2/1+cos theta - tan squared (theta/2) = 1
Monday, March 19, 2012 at 12:09am

trig e-maths
giving that cosx=4/5 and siny=12/13, find cos(x+y) when x is acute and y is obtuse angle
Sunday, March 18, 2012 at 9:58am

trig
a plane takes off at 10.00am from an airfield, and flies at 120km/h on a bearing of N35W. A second plane takes off at 10.05am from the same airfield, and flies on a bearing of S80E at a speed of 90km/h. How far apart are the planes at 10.25am?
Sunday, March 18, 2012 at 7:29am

trig
Find the general solution for x if cos2x + sin3x = sinx
Sunday, March 18, 2012 at 5:22am

inverse trig HELP PLEASE!!
Write the general solution to y = arcsin (0.6428). 40°±360°k 140°±360°k 220°±360°k 320°±360°k How do I find the right answer? I am like seriously stuck. I need help please.
Sunday, March 18, 2012 at 12:12am

trig
In a computer simulation, a satellite orbits around Earth at a distance from the Earth's surface of 2.1 X 104 miles. The orbit is circular, and one revolution around Earth takes 10.5 days. Assuming the radius of the Earth is 3960 miles, find the linear speed (velocity) of ...
Saturday, March 17, 2012 at 10:59pm

trig
solve for theta 6. tan theta=-1 7. sin(theta/2)=1/2 thank you for your help!
Saturday, March 17, 2012 at 6:00pm

trig
when sin theta+cos theta=square root of 2,find the solution of sin^3 theta+cos^3 theta
Saturday, March 17, 2012 at 3:51pm

Algebra-Trig help asap
A rhombus has sides of 5 cm each and one diagonal is 6 cm long. Find the area of the rhombus.
Tuesday, March 13, 2012 at 5:37pm

Math:Trig.!!!!
You (safely) bungee jump from a 200-feet tall bridge in your town. Your distance above the water's surface depends on the time since you jumped. Sketch a reasonable graph.
Monday, March 12, 2012 at 10:02pm

trig
solve the equation 2 tan C-3=3 tan X-4 algebraically for all values of C in the interval odegrees lessthan or equal C lessthan360 degrees.
Monday, March 12, 2012 at 9:20pm

Trig-Algebra help asap
A regular octagon is inscribed in a circle with a radius of 5 cm. Find the area of the octagon.
Monday, March 12, 2012 at 8:50pm

Trig-Algebra help asap
A regular pentagon is inscribed in a circle whose radius measures 7 cm. Find the area of the pentagon.
Monday, March 12, 2012 at 8:49pm

Trig-Algebra help asap
A rhombus has sides of 5 cm and one diagonal is 6 cm long. Find the area of the rhombus.
Monday, March 12, 2012 at 8:17pm

Trig-Algebra help asap
The adjacent sides of a parallelogram measure 8 cm and 12 cm and one angle measures 60 degrees. Find the area of the parellelogram.
Monday, March 12, 2012 at 7:50pm

trig
SOlve over (2,pie) and find the general solution in radians. 2sin3x = square root of 2
Monday, March 12, 2012 at 7:32pm

trig
5sin(2x)+4cos(x)=0
Monday, March 12, 2012 at 6:04pm

trig
5sin(2x)+4cos(x)+0
Monday, March 12, 2012 at 6:03pm

trig
cos x/1+sin x + 1+sin x/ cos x= 2sec x
Monday, March 12, 2012 at 5:09pm

trig
verify the identity algebraically- (5-5 cos x)(5+5 cos x)=25 (sin^x)
Monday, March 12, 2012 at 5:07pm

Trig Help
Prove the following: [1+sinx]/[1+cscx]=tanx/secx =[1+sinx]/[1+1/sinx] =[1+sinx]/[(sinx+1)/sinx] =[1+sinx]*[sinx/(sinx+1)] =[sinx+sin^2x]/[sinx+1] =[sinx+(1-cos^2x)]/[sinx+1] =??? This is where I'm stuck. Can someone help me. Please check what I got is right so far it's...
Sunday, March 11, 2012 at 11:42pm

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
Sunday, March 11, 2012 at 7:09pm

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
Sunday, March 11, 2012 at 7:09pm

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