Solution

prove

Solution

Solution steps
Use the Pythagorean identity:

Popular Examples

prove ((1-cos(-x)))/(sec(-x)-1)=cos(x)prove 1-cot^2(θ)=2-csc^2(θ)prove cos(-θ+pi/2)=sin(θ)prove 1-sin(2x)csc(x)=cos(x)cot(x)prove (cos(2x))/(1-sin^2(x))=2-sec^2(x)

Frequently Asked Questions (FAQ)

  • Is cos^2(x)-1=-sin^2(x) ?

    The answer to whether cos^2(x)-1=-sin^2(x) is True