Verify that the equation is an identity. cos (x+y)+ cos (x-y) = 2 cos x cos y cos (x +y)+ cos (x - y) = 0 +O (Type the terms of your expression in the same order as they appear in the ori (Do not combine like terms.) = 2 cos x cos y Use the even-odd identities. Use the Pythagorean identities. Use the quotient identities. Use the sum and difference identities.

Q: Identify whether the given equation is an identity or a conditional equation. Write your answer on a…

A: # we are entitled to solve one question at a time (3 sub parts at a time), please resubmit the other…

Q: Determine if each equation is an identity by graphing each side v sin² (x)+cos² (x) sin(x) csc (x)…

A: An identity is an equation which is satisfied for all 'x' values in the domain.

Q: Use even-odd identities to find the value. If sec(-a) =-1.21, find csc a -

A:

Q: Write an equivalent algebraic expression that involves x only.      tan (cos- 1 x)

A: Evaluate tancos-1x       ...(1)

Q: Prove the identity. Transform the right side of the equation into the left cotx(1 - cos2x) =…

A: Given,             cotx1-cos2x=12sin2xTo find : Prove the identity. Transform the right side of the…

Q: Evaluate the expression without using a calculator. (Assume the variable represents a positive…

A: We have to use formula for  cos(2θ)  =  ( 2*cos2(θ) - 1 )

Q: Complete the sentence below. -1 COS cos (cos x) =x where 3Dx cos (cos x) = x where Cos 0<x<2x.…

A: