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October 24, 2014

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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Trig
IfA=340°, prove that 2cosA/2 = -(v1+sinA) - (v1-sinA)
Thursday, January 12, 2012 at 5:12am

trig
evaluate sin (11pi/6) to the nearest thousandth.
Wednesday, January 11, 2012 at 11:49pm

trig
write sec theta in terms of sin theta when theta lies in quadrant III
Wednesday, January 11, 2012 at 11:43pm

trig
what is the amplitude of y=2+cos(-1/2 theta)?
Tuesday, January 10, 2012 at 8:22am

Trig
The question is: Set up a 2 column proof to show that each of the equations is an identity. Transform the left side to become the right side. a. (tan + cot)^2 = sec^2 + csc^2 I'm having trouble with this. b. (cos + sin)/cos + (cos - sin)/sin = csc sec I'm having ...
Sunday, January 8, 2012 at 9:48pm

Trig
(sin/cos)/ ( 1/cos - 1) = I'm stumped
Sunday, January 8, 2012 at 7:49pm

Trig
Proving Identities: 2 columns (tan + cot)^2 = sec^2 + csc^2 I'm having trouble breaking down the left side to = the right side.. Any help please
Sunday, January 8, 2012 at 7:38pm

trig
how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant II,and cos B = 15/17, B lies in quadrant I.
Sunday, January 8, 2012 at 6:45pm

trig
solve for x in the following equations: 1) sin(arcsin x) = 1 2) 2arcsin x = 1 3) cos(arccos x) = 1/3
Sunday, January 8, 2012 at 10:34am

Trig
the horizontal speed of an airplane is 183mph. the magnitude of the plane's velocity is 200mph. write an expression describing the angle the angle the plane is climbing my solution: cos-1 183/200 is this right
Sunday, January 8, 2012 at 6:32am

trig
express 4/5-radical 13
Thursday, January 5, 2012 at 8:59pm

trig
express 4/5-ã13 plz
Thursday, January 5, 2012 at 8:58pm

trig
express 4/5-ã13 plz
Thursday, January 5, 2012 at 8:57pm

Trig
the center of a circle x^2 + y^2 + 8y =1 is a. (0,-2) b. (0,4) c. (0,1) d. (0,-4) I believe the answer is (0,4) Am I correct ?
Wednesday, January 4, 2012 at 10:34pm

Trig
The center of the circle (x+2)^2 + (y-3)^2 =1 is a. (2,3) b. (-2,3) c. (2,-3) d. (-2,-3) I believe b. is the answer, is that correct?
Wednesday, January 4, 2012 at 10:13pm

Trig
The radius of: (x+2)^2 + (y-3)^2 =9 is 3 is this correct?
Wednesday, January 4, 2012 at 10:04pm

Trig
If the center of a circle is at (2,2) with a radius of 4 the equation of the graph would be : a) (x-2)^2 + (y-2)^2 = 16 b) (x+2)^2 + (y+2)^2 = 16 I think it would be b is that correct?
Wednesday, January 4, 2012 at 10:02pm

trig
A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured clockwise from north) must she aim her canoe? How long will it take her to go ...
Wednesday, January 4, 2012 at 8:20am

trig
prove that tan^2x+ sec^2x =1
Tuesday, January 3, 2012 at 3:58pm

Trig
Prove that 1 + tanAtanA/2 = tanAcotA/2 -1 = secA
Tuesday, January 3, 2012 at 9:40am

Trig
Half Angle Identities cosx = 7/25 greater than 270 deg and less than 360 Determine cos 1/2x a. -7rt2/10 b. 7rt2/5 c.7/25 d.-4/5 I get 7rt2/5 Is this correct??
Monday, January 2, 2012 at 8:04pm

Trig
sinAsin2A+sin3Asin6A+sin4Asin13A/sinAcos​2A+sin3Acos6A+sin4Acos13A = tan9A
Monday, January 2, 2012 at 10:54am

Trig
Half angle identities Find exact values of a) cos 1/2 b) sin 1/2 c) tan 1/2 based on: cos = 1/5 greater than 270 deg less than 360 deg. I get a) - rt 3/5 b) rt24/5 and c) does not work out at all .... Help please.. book says for answers a)-rt15/5 b) rt10/5 c) -rt6/3 How do you...
Sunday, January 1, 2012 at 6:16pm

trig
for the equation 4 cos alpha - square root 12 = 0
Saturday, December 31, 2011 at 12:50am

trig
differenthate sin8x from first principle?
Thursday, December 29, 2011 at 5:40am

Trig
If sinx = 1/4 Find the exact value of cos2x I used the formula for double angle identities : cos2x = 1-2sin^2x and got the answer 1/2 The book says the answer is 7/8 How would they get to that conclusion?
Tuesday, December 27, 2011 at 8:53pm

Trig
If tanx = 2/3 tany = 1/2 then tan(x-y) = ?? a.7/4 b.7/6 c.1/8 d.8/6 which answer is correct ??
Tuesday, December 27, 2011 at 6:42pm

Trig
sin45cos25 + cos45sin25 = ?? a. cos70 b. sin70 c. cos20 d. sin 20 which answer is correct ??
Tuesday, December 27, 2011 at 6:39pm

Trig
cos45cos25 - sin 45sin25 = ?? a. cos70 b. sin70 c. cos 20 d. sin 20 which answer is correct ?
Tuesday, December 27, 2011 at 6:37pm

trig
Matt has a large family when looking at the dates of their birthdays, he noticed that every prime day had at least one birthday. this was also true for perfect squares cubes and multiples of 3,5,7, and 11. what days (1 to 31) are not represented
Tuesday, December 27, 2011 at 10:37am

Trig
Use reduction identities to determine if the following statement is true or false: tan (A-B) = tan (B-A) Is this starement True or False ?
Thursday, December 22, 2011 at 10:56pm

Trig
Rewrite tan 88 deg in terms of its cofunction How does that end up????
Thursday, December 22, 2011 at 10:52pm

I have a question concerning Spring Semester
Im a freshman in college and I just took Chem1, Trig, and Drama (12units). I am planning on taking Chem2, Pre-Calc, and Art1 for spring sem. (13units). I'm not sure if this is too much to take for next semester considering two five unit classes or should I add another ...
Thursday, December 22, 2011 at 8:53pm

Trig
3. In the figure below, the perimeter of the parallelogram ABCD is (6a + 8b + 29) and the perimeter of the triangle ACD is (3a + 4b + 32). What is the length of AC
Wednesday, December 21, 2011 at 11:26am

Solving trig functions! urgent please help!
1.2sinxtanx + tanx-2sinx-1=0 2.6tan^2x-4sin^2x=1 Both functions is for 0<x<2pi thank you!
Tuesday, December 20, 2011 at 11:57pm

Trig
cot (tan + cot) = ?
Tuesday, December 20, 2011 at 9:57pm

Trig
( sec -1 )(sec +1 ) = ?
Tuesday, December 20, 2011 at 9:56pm

Trig
sin/tan = ?
Tuesday, December 20, 2011 at 9:55pm

Trig - Thanks Damon and Lindsey
Thanks a bunch
Tuesday, December 20, 2011 at 8:32pm

trig
The cross section of a television antenna dish is a parabola. A dish has a receiver that is located at the focus, 4 ft. above the vertex. Find the equation. (which I did) -- x^2 = 8y If the dish is 8 feet wide, how deep is it?
Tuesday, December 20, 2011 at 8:19pm

Trig
If sin = 2/3 and is a second quadrant angle, determine the exact value of sec^2 could be a. 5/9 b. root5/3 c. 9/4 d. 9/5 Please help.......
Tuesday, December 20, 2011 at 8:16pm

trig
You are sky diving and are trying to land on a target with a radius of 15 m. You land 10 m west and 10 m north of the center of the target. a. Write an inequality to describe the region inside the target area. b. Do you land within the target area? c. If another skydiver lands...
Tuesday, December 20, 2011 at 6:16pm

trig
cot^5 x = cot x/sec^4 x - 2 sec^2 x +1
Monday, December 19, 2011 at 11:06pm

trig
find the exact value of sin(u+v) given that sin u=3/5 and sin v= 15/17
Sunday, December 18, 2011 at 11:20pm

trig
Solve the following equation for È <= È <= 2(pi) 2 tan È + 3 = tan È
Sunday, December 18, 2011 at 8:20pm

trig math
Prove that tan(theta)tan(60+theta)=tan3theta
Saturday, December 17, 2011 at 9:06pm

Trig
The next two steps in solving this trig identity question are ??? 1/csctheta x costheta x sintheta x sectheta = sinsqtheta arghhh need help please
Saturday, December 17, 2011 at 7:43pm

Trig
Prove the equation is an identity : csc3theta - csctheta + cottheta/csctheta = cotsqtheta + costheta wow ... try that one
Saturday, December 17, 2011 at 6:50pm

Trig
Prove that the equation is an identity: cot4theta - csc4theta = -cot sq theta - csc sq theta How ??
Saturday, December 17, 2011 at 6:47pm

Trig - Thanks Damon
Thanks for the help Damon. Much appreciated. Don
Saturday, December 17, 2011 at 5:12pm

Trig
Column 1 Column 2 (sin theta + cos theta)sq 1 + 2sin theta cos theta Question : how do you get column 1 to be the same as column 2?? using the trig identities
Saturday, December 17, 2011 at 4:35pm

Trig
Column 1 Column 2 sec theta - cos theta tan theta sin theta Question: how do you get column 1 to be the same as column 2 ?? using the eight fundamental identities
Saturday, December 17, 2011 at 4:32pm

Trig
Please disregard last question .... wrote it down wrong .. Thanks
Saturday, December 17, 2011 at 1:53pm

Trig
Eight Fundamental Identities Sec thada - Cos thada How do I do this?
Saturday, December 17, 2011 at 1:49pm

trig (pre-cal class)
Suppose è is an acute angle of a right triangle. For this function, find the values of the remaining five trigonometric functions of è. Round to four decimal places. sin è = 0.1 cos è = tan è = cot è = csc è = sec è =
Thursday, December 15, 2011 at 7:28pm

trig
How do you find 2.8 revolutions per second in radians? I understand that two revolutions would be equal to 4pie but how do you find the 0.8?
Wednesday, December 14, 2011 at 9:02pm

trig
A force of 50 pounds acts on an object at an angle of 45°. A second force of 75 pounds acts on the object at an angle of -30°. Find the direction and magnitude of the resultant force.
Wednesday, December 14, 2011 at 8:33pm

trig
A bolt secured to a bridge is being acted upon by forces being exerted by two cables attached to the bolt. The force vector for one of the cables is represented by F1 = <1.7,9.8>. The other force vector, F2, is known to have a magnitude 5 and a direction angle of 10 ...
Wednesday, December 14, 2011 at 7:30pm

trig
SinA =0.5 cosA=?
Wednesday, December 14, 2011 at 9:00am

trig
Find ALL solutions to the equation on the interval [0, 2pie]: 2sin(1/2X) = 1
Wednesday, December 14, 2011 at 12:02am

trig
Find the exact values of the inverse function arcsin 1/2
Tuesday, December 13, 2011 at 11:06pm

trig
A tree casts a shadow 203 feet long. Find the number of feet in the height of the tree knowing that the angle of elevation of the sun is 16 degrees. Give your answer to the nearest integer. a. 57 b. 56 c. 61 d. 58 e. 55
Tuesday, December 13, 2011 at 7:31pm

Trig
The set of solution(s) of 2 cos^2 (θ) - 13 cos(θ) + 6 = 0 that is(are) in the interval (0,π/2) is one of following a. {π/6} b. {π/3} c. {π/4} d. {π/3, π/6} e. {π/6, π/4}
Tuesday, December 13, 2011 at 7:19pm

Trig
In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A
Tuesday, December 13, 2011 at 6:45pm

Trig
How do you find cosine, tangent, and cotangent periods?
Tuesday, December 13, 2011 at 6:38pm

Trig
Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above
Tuesday, December 13, 2011 at 6:24pm

trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx
Tuesday, December 13, 2011 at 6:03pm

trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx
Tuesday, December 13, 2011 at 6:03pm

trig/precalculus
A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x? A. M = tanx B. M = cotx C. ...
Tuesday, December 13, 2011 at 10:49am

trig/precalculus
A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x? A. M = tanx B. M = cotx C. M...
Tuesday, December 13, 2011 at 12:31am

Math - Trig
For the equation 4 cos theta - square root 12 = 0, where 0 < theta < (or equal to) 2 pi, determine the measure of theta. The answers to choose from are: A) pi/ 3, 5 pi/ 3 B) 2 pi/ 3, 4 pi/ 3 C) 5 pi/ 6, 7 pi/ 6 D) pi/ 6, 11 pi/ 6 Please explain and show work, because I ...
Monday, December 12, 2011 at 2:36pm

trig
Find the exact value of the trigonometric function. -cot(pi/4 + 16pi)
Monday, December 12, 2011 at 8:59am

trig
How do you evaluate the expression cos3pi
Sunday, December 11, 2011 at 10:14pm

trig
A satellite is in geostationary orbit 22,500 miles above the earth. IF the radius of the earth is 3,960 miles, how fast is the satellite moving in miles per day? How fast is the satellite moving in miles per hour?
Sunday, December 11, 2011 at 8:02pm

Math
Trying to understand an inverse trig function. Evaluate Cos^-1 (sqr3/2) So I know it's 30 degrees, but wouldn't it also be 150 degrees because the Arc-cos is defined in the 2nd quadrant?
Sunday, December 11, 2011 at 6:12pm

trig
Getting ready for trig semester finals. Can't figure out how they are simplifying these equations. (these are the review not actual test) tanx-sqr3=2tanx and 2sin^2+sinx=0
Sunday, December 11, 2011 at 4:49pm

trig
How do I solve.... Tan 2(theta) - Cos 4(theta) = 0 Domain: (0-360 degrees) Thank you.
Sunday, December 11, 2011 at 4:35pm

Math: Trig
to determine the height of a pole across a road, Justin takes two measurments. he stands at Point A directly across from the bass of the pole and determines that the angle of elevation to the top of the pole is 15.3 degrees. he then walks 30m parallel to the freeway to point C...
Sunday, December 11, 2011 at 4:00pm

trig
How do i solve this equation over the interval [0degrees,360) cot(theta)+2csc(theta)=5
Saturday, December 10, 2011 at 9:22pm

trig
The manufacturer of a propeller for a small aircraft mandates a maximum operating angular velocity of 300 rad/s. Determine whether it is safe to install this propeller whose aircraft whose engine is expected to run at a maximum of 2800 rpm
Saturday, December 10, 2011 at 8:09pm

trig
If θ is an angle in standard position and its terminal side passes through the point (20,-21), find the exact value of sec(θ).
Friday, December 9, 2011 at 11:36am

trig
If (cosa-sina)/sina = 2 , then what is tga = ?
Friday, December 9, 2011 at 11:21am

trig
find an expression equivalent to sec theta sin theta cot theta csc theta
Thursday, December 8, 2011 at 7:57pm

Math- Trig
In an oblique triangle ABC, A=30 degree, and the perpendicular from C to AB is 12 inches long. Find the length of AB.
Thursday, December 8, 2011 at 3:02pm

trig
Prove that the statement is an identity: (tanx/cscx)=(1/cosx)-cosx
Wednesday, December 7, 2011 at 10:31pm

trig
tan theta= -4/3 and sec theta<0 find sin (theta = pi/6)
Wednesday, December 7, 2011 at 7:39pm

Trig
1. Establish the identity: sin(theta+3pi/2)=-cos(theta) 2. Find the exact value of 2(theta) if sin(theta)=5/13 3. Show that: csc2(theta)-cot2(theta)=tan(theta) 4. Find the exact value of tan(cos^-1(square root of 3/2) 5. Approximate the value rounded to two decimal places: csc...
Wednesday, December 7, 2011 at 5:55pm

trig
simplify: (2sin(2pie/7))/(3cos(3pie/14)
Wednesday, December 7, 2011 at 2:52pm

trig
I need to prove parallelogram law using the law of cosines. 2AB^2 + 2BC^2 = AC^2 + BD^2 Please, help me to do this.
Wednesday, December 7, 2011 at 12:18pm

trig
Cos 3 alpha = - 0.1 solutions in degree
Wednesday, December 7, 2011 at 12:07pm

trig
a right triangle contains a 25 angle. if me leg is of length 5 inches what is the length of the hypotenuse
Wednesday, December 7, 2011 at 11:50am

trig
CosA*Cos17=1 then determine A
Wednesday, December 7, 2011 at 6:51am

Trig
Sec (23π/6)
Tuesday, December 6, 2011 at 4:25pm

Math - Trig please help!
State two intervals in which the function y=7sin(1/5x)+2 has an average rate of change that is: a) zero b)a negative value c)a positive value Please explain how to get the intervals! Thanks a lot in advance!
Monday, December 5, 2011 at 11:33pm

trig
Find all the solutions of 2 sinx=1-cosx in the interval from 0° ≤x<360°
Monday, December 5, 2011 at 9:35pm

trig
if the terminal ray of an angle 0 in standard position passes through the point (-1,3),then cos0=
Monday, December 5, 2011 at 6:20pm

trig
find all solutions of 2sinx=1-cosx in the interval from 0 to 360
Monday, December 5, 2011 at 5:27pm

precalc/trig
Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45
Monday, December 5, 2011 at 2:01pm

precalc
Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4
Monday, December 5, 2011 at 1:34pm

trig
Find the exact solutions of the equation in the interval [0,2pi). sin(x/2)+cos(x)=0
Monday, December 5, 2011 at 12:40pm

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