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 cos(pi/3+x)+cos(pi/3-x)=cos(x)prove cos^2(2x)=(1+cos(4x))/2prove sin^2(θ)csc^2(θ)-sin^2(θ)=cos^2(θ)prove cos(x+pi/3)+sin(x-pi/6)=0prove (1-tan^2(b))/(1+tan^2(b))=cos(2b)

Frequently Asked Questions (FAQ)

  • Is sec(-x)=sec(x) ?

    The answer to whether sec(-x)=sec(x) is True