126 Answered Questions for the topic Cosine

01/10/16

convert the following parametric equations into a rectangular equation x=-2sinT y=2cosT
convert the following parametric equations into a rectangular equation x=-2sinT y=2cosT
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Cosine

12/10/15

Finding exact values for Cosine
Let θ be an angle in quadrant III such that cos θ = −2/3   Find the exact values of all of the five other trigonometric functions.
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11/30/15

Solve the equation...
Solve sin(2θ) = cos(θ) for 0 ≤ θ < 2π (Hint: there will be a total of 4 solutions!)
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11/30/15

Find the exact value of cosine equation
Find the exact value of: cos(165?) − cos(75?)
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11/30/15

Using algebra to prove identities
Use algebra to prove the identity: cos(x)/1-sin(x) − tan(x) = 1 cos(x)
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11/22/15

2sin(pi/3x) =sqrt2
Find all solutions on the interval 0< (or equal to) theta < 2pi   Help! Show steps please. thanks
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11/22/15

cos^3(t) = -cos (t)
Find all solutions on the interval [0,2pi)  Please help and show steps!!   Thank you! 
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11/22/15

2cos (3t) = -1
Help!! Find all solutions. Please show steps.   Thank you!
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Cosine Simplify Sine

11/21/15

Prove 2sec^2(t) = (1-sin(t) /cos^2(t)) + (1 / (1-sin(t)))
Please simplify the (1-sinT / cos^2T) + (1/(1 - sin(t))) side.   I did the problem just didn't know all of the right steps and just assumed..   Please help! Thanks!
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Cosine Simplify Sine

11/21/15

Simplify (1+sin(t)) / (1+csc(t))
I understand you get on the denominator (1+(1/sin(t))  I don't know how to simplify from there.   please help! Thanks!
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11/19/15

Cosine trigonometry
Assume 0 ≤ θ ≤ πIf cos(θ) = 1, What is csc(θ)? cot(θ)?
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11/10/15

Find all six trigonometric function values given cos x=7/12 and 3pi/2<x<2pi
need help solving
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11/10/15

Cos(tan^-1(-3))
How do I do it
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11/10/15

Cos 16pi/9 cos 10pi/9 + sin 16pi/9 sin 10pi/9
I don't know how to solve
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10/29/15

Sine and Cosine with angles
Find an angle θ, with 0? < θ < 360?, that has the same: (a) Cosine as 240? (b) Sine as 240?
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10/28/15

Using the pythagorean identity, find the value of sin? and tan? if cos?= -1/2
Using the pythagorean identity, find the value of sin⊗ and tan⊗ if cos⊗= -1/2
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10/28/15

Explain why sin?^2 + cos?^2=1
Explain why sin⊗2 + cos⊗2=1
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10/25/15

trig. unit circle? HElp???
Find the radian measure of the central angle of a circle of radius 96 km that intercepts an arc of length 294 km. Answer in units of rad
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07/31/15

I found an answer to my problem but I don't think its simplified. Here it is:
cosine 48= 13/x .6691=13/x 1/13 ∗ .6691 = 13/x ∗ 1/13 .6691/13=x   Can my answer be simplified further?!? Please help me!
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07/08/15

if ? is in quadrant IV, what can be a value of cos? ?
trigonometry help, answer as soon as possible!
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06/02/15

answer this please
The population of rabbits follows the curve represented by the equation: R=500 sin 1/2pie(m+3)+100 How many rabbits will be present in 38 months?
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05/27/15

Solve each equation on the interval
0 less than or equal to theta less than or equal to 2pi cos(theta)=1/2 cos(theta)=-square root 3/2
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05/21/15

Suppose ? is an angle in standard position
Suppose θ is an angle in standard position And cos θ=-1/2 and sinθ=-square root of 3 over 2. Can the value of θ be 60 degrees? Can it be -120 degrees ? 
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04/15/15

Find the domain of the inverse function of
f(x)=cos-1(2x/3)+5 for -3/2≤x≤3/2
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03/23/15

Given that z1 = 4 (cos 45° + i sin 45°) and z2 = 2 (cos 30° + i sin 30°)
Given that z1 = 4 (cos 45° + i sin 45°) and z2 = 2 (cos 30° + i sin 30°).Whats 1. z1 * z2 2. z1/z2Please post steps! Thanks!!!!!!
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