Solution

prove

Solution

Solution steps
Manipulating left side
Use the negative angle identity:
We showed that the two sides could take the same form

Popular Examples

prove 4cos^3(x)-3cos(x)=cos(3x)prove csc^2(-θ)-1=cot^2(θ)prove cos(6x)=2cos^2(3x)-1prove tan^2(x)-tan^2(x)sin^2(x)=sin^2(x)prove csc(2x)=(csc(x))/(2cos(x))

Frequently Asked Questions (FAQ)

  • Is cos(θ)=cos(-θ) ?

    The answer to whether cos(θ)=cos(-θ) is True