Solution

prove

Solution

Solution steps
Use the Pythagorean identity:

Popular Examples

prove cos(-θ)=cos(θ)prove 1+sin(2θ)=(sin(θ)+cos(θ))^2prove cos((5pi)/4-x)=-(sqrt(2))/2 (cos(x)+sin(x))prove 5cos^2(θ)+3sin^2(θ)=3+2cos^2(θ)prove cos(x+pi/3)+cos(x-pi/3)=cos(x)

Frequently Asked Questions (FAQ)

  • Is tan^2(x)-sec^2(x)=-1 ?

    The answer to whether tan^2(x)-sec^2(x)=-1 is True