266 Answered Questions for the topic trigonometric identities

Trigonometric Identities Math Calculus Trigonometry Identities


(tanθ+cotθ)^2=sec^2θ csc^2θ

Proving identities
Trigonometric Identities Math Homework Asap


If sin(26)+sin(24)=Sin(A), 0<A<90, then A=____ degrees.

I know this is with the sum-to-product identity, but I need help with the steps.
Trigonometric Identities


show that 1/(1-cos x) - 1/(1+cos x)=2cosec x cot x

show that 1/(1-cos x) - 1/(1+cos x)=2cosec x cot x


Find the exact value of cos 15 degrees= sqrt(A)(sqrt(B)+1)/4...what is A and what is B?

I know how to get the answer, but for some reason, they want it in this format and I'm not sure how to do it this way.
Trigonometric Identities Trigonometry


Prove if this is true or false 1-sinϴ • cosϴ •tanϴ=cos^2ϴ and cos^2ϴ • tanϴ= sinϴ

Its two questions Prove if this is true or false 1-sinϴ • cosϴ •tanϴ=cos^2ϴ and cos^2ϴ • tanϴ= sinϴ 
Trigonometric Identities Math Equations Math Help


Solve the trigonometric equation for the interval 0<x<2pi

4 sin x cos x - 2√3 sin x - 2√2 cos x +√6=0   interval 0≤x<2pi
Trigonometric Identities Trigonometric Functions


By definition of amplitude, in order for a function to have an amplitude the function must be...

There are 2 possible answers I can choose from. Either Bounded or Continuous
Trigonometric Identities Math Trigonometry Mathematics


Determine A, B and C so that the formula (cosx−5sinx)^2 = A cos2x + B sin2x + C is valid for all values on x. A, B och C are integers.

This is translated from a trigonometry problem in another language, I hope you understand it.
Trigonometric Identities Trigonometry Trig Trigonometric Functions


find the exact values of the expressions without solving for x.

If sin(x) = 1/4 and x is in quadrantI,find the exact values of the expressions without solving for x.   (a) sin(2x) (b) cos(2x) (c) tan(2x)
Trigonometric Identities Math Trigonometry


find the exact values of sin(a+b) and cos(a-b)

Given that sin(a)=2/3 and cos(b)=-1/5, with a and b both in the interval of pi - pi/2
Trigonometric Identities Trigonometry Identities


Verifying Trig identity

Hello! I am having some trouble verifying a trig identity   sin(4x)=4cos^3(x)sin(x)-4sin^3(x)cos(x)
Trigonometric Identities


Find the expression that is equal to (tan(theta)+cot(theta))^2:

a)  tan^2(theta)+cos^2(theta)   b)  2tan(theta)cot(theta)   c)  2cot^2(theta)-1   d)  sec^2(theta)+csc^2(theta)
Trigonometric Identities Math Calculus Math Help


Trig Question

Prove sec2x-1=sec2xsin2x, justify significant steps. (state identities used)
Trigonometric Identities Trigonometry Math Help Mathematics


Trigonometry Proof

Please help me answer the following question! I'm stuck!   Prove that cos6ß + sin6ß = 1/4 + 3/4cos2ß   I've tried simplifying out the LHS into (cos2ß)3 + (sin2ß)3, but I don't know what to do... more
Trigonometric Identities Precalculus Trigonometry


find exact solution for x real in degrees. tan x = -2sinx, 0 ≤ x < 360

This is my work.   tanx = -2sinx sinx/cosx = -2sinx sinx = -2sinxcosx     (multiply by cosx) 1 = -2cosx               (divide by sinx) -1/2 = cosx              (divide by -2)   X can be 120... more
Trigonometric Identities


With reference to the definitions of sinhx and coshx show that: cosh^2 x-sinh^2 x =1

sinh x = (e^x-e^-x/2) and cosh x = (e^x + e^-x/2) 
Trigonometric Identities


With Reference to the standard right angle triangle, show that cosec^2 x =1+cot^2 x

Using Pythagoras, and making reference to a right angle triangle.  
Trigonometric Identities


Solve the equation giving all values of x which lie between 0 degrees and 360 degrees

1) 2sec x =4.6 2) 3cos^2 x + cos x-2 =0 3) Sech x =0.554
Trigonometric Identities Precalculus


How do you prove sin(4z) = [4tan(z)(1-tan^2(z))]/(1+tan^2(z))^2

Prove sin4z = [4tanz(1-tan2z)]/(1+tan2z)2
Trigonometric Identities



verify the trig identity plz help!!!
Trigonometric Identities


if sin theta is equal to 3/5 on the interval (pi/2 , pi), what is tan 2 theta?

 if sin theta is equal to 3/5 on the interval (pi/2 , pi), what is tan 2 theta?
Trigonometric Identities


How to solve (sinx/1-cscx)-(sinx/1+cscx)= -2cot^2x?

I need to set the problem sides equal to each other. A step-by-step guide would be helpful. My entire class doesn't understand it.
Trigonometric Identities


1.Secy/coty + tany)2.tanycoty)(tany+ coty)3.( Siny + cosy)(secy + cscy)4.tany(cosy - cscy)5.Siny +cosy)(secy +cscy)6.(siny-cosy)^2 9.tan165)10.sin225)12.cos165)

These are multiple questions that I need help with. Numbers 1.( Ask to simplify) 2-6 (ask to multiply and simplify) and 9-14 ask to find angle sum and difference.    Note: I'm also looking for a... more
Trigonometric Identities


(Siny - cosy) (siny + cosy)

I need to simplify using Pythagorean identities I need hel asap
Trigonometric Identities



I need some help with the steps to solving this, I know that I need to foil out the problem but I need to get a numerical value for the expression. 

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