266 Answered Questions for the topic trigonometric identities

Trigonometric Identities

05/01/16

find all solutions to sin?=0.7 on interval 3pi =? =5pi

round to 3 decimal places  
Trigonometric Identities Trigonometry Math Help Alegbra 2

04/30/16

Find cos T if sin T = 2/3

Assume the terminal side of the angle falls in Quadrant 2. Show all work.
Trigonometric Identities Trigonometry Trig Trig Identities

04/27/16

Find tan(2 Theta +pi) using the picture:

You have a right triangle and the hypotenuse is 10 and adjacent side is 6 and the opposite side is 8, this is what the triangle looks like except NO... more
Trigonometric Identities

04/26/16

prove the following trigonometric identity

(sin2∅)-1/(tan2∅)-1= (1/sin2∅)-1
Trigonometric Identities

04/26/16

prove the following trigonometric identity

(sin2∅-1)/tan2∅-1=(1/sin2∅)-1
Trigonometric Identities

04/26/16

prove the following trigonometric identity

(sin2∅-1)/(tan2) = (1/sin2∅)-1
Trigonometric Identities

04/17/16

Find the exact value of the expression: sin[sin-1 9/41-cos-1(-4/5)]

Please help
Trigonometric Identities

03/23/16

Rewrite the expression in terms of the given function or functions.

csc(x) +tan2 (x) csc (x); cos x and sin x
Trigonometric Identities

03/22/16

Trigonometric Identites

How do you verify the identity of sin^2x-sin^4x=cos^2x-cos^4x
Trigonometric Identities

03/22/16

How do you verify the identity of the following

cos^2x-sin^2x = 1-2sin^2x I am unsure how to do my homework, not looking for answers. Just want to know how to finish these identities. 
Trigonometric Identities

03/18/16

(sinx+cosxcotx)/(cosxcscx)=secx

Trig Identities 
Trigonometric Identities

03/16/16

Solve the equation for the principle values of x. Expess solution in degrees. 2sin^2x+sinx-1=0

I think I am way overthinking this one so if anyone can give a step by step walk-through that would be amaing!
Trigonometric Identities

03/11/16

solve the equation Tan2x-3=0

solve the equation Tan2x-3=0  
Trigonometric Identities

02/29/16

Trigonometric equation question

if a trigonometric equation has an infinite number of solutions, is it true that the Equation is an identity?  Please explain 
Trigonometric Identities

02/14/16

show that (1+sin?)/cos? = cos?/(1-sin?)

(1+sin theta)/cos theta is equal to cos theta/(1-sin theta) pls i hav tried buh it seems undefined
Trigonometric Identities Trigonometry

01/06/16

Write cos(theta) in terms of sin(theta) only

I need to express cos(theta) in terms of sin(theta) only. Thank you in advance for your help. 
Trigonometric Identities Maths

01/03/16

Maths Trig identities

Exact value of Sin pi/12   I got this answer to be  (√6 - √2 )/4 (part a)   I then done the half angled identity to be  √(2 - √3)/2 (part b)   Both these expressions are equivalent and I need... more

12/07/15

Please Help. Establish Identity: sin(x+y)/tan(x)+tan(y)= cos(x)cos(y)

Please Help. Establish Identity: sin(x+y)/tan(x)+tan(y)= cos(x)cos(y)
Trigonometric Identities

11/28/15

what would be the solutions to (sin2x+cos2x)^2=1?

I know that this can be expanded to (sin2x+cos2x) (sin2x+cos2x)=1, which can be multiplied to be sin^2(4x)+2sin(2x)cos(2x)+cos^2(4x)=1. Or am I missing something here? I'm not sure what to do after... more
Trigonometric Identities

11/27/15

Finding the value of alpha

Given cos(alpha)=5/6 and alpha is in quadrant I, find the exact value of cos(alpha/2). Note: You are not allowed to use decimals in your answer.
Trigonometric Identities

11/19/15

Verify the identify

tan(x) + 1 / sec(x) = sin(x) + cos(x)
Trigonometric Identities

11/18/15

Trig identities help please??

(1/2)sin(2x) / sin2 x 
Trigonometric Identities

11/18/15

Trig identities help please?

cos2 x + (sin x + 1)2 / sin x + 1
Trigonometric Identities Math Calculus Precalculus

11/18/15

Prove v(3cosx+4sinx)2+(4cosx-3sinx)2 = 5

Proving Basic Problems: I have to prove that one side equals the other using identities.   √(3cosx+4sinx)2+(4cosx-3sinx)2 = 5   Please show the steps or even try to explain the process to me! :)
Trigonometric Identities

11/11/15

Finding the variable A

sect - 1/sect + 1 = A - cost/A + cost Find A.

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