Solution

prove

Solution

Solution steps
Use the Pythagorean identity:

Popular Examples

prove sin(x-pi/2)=-cos(x)prove cos^2(y)-sin^2(y)=1-2sin^2(y)prove cos^4(x)-sin^4(x)=1-2sin^2(x)prove sin(x+y)-sin(x-y)=2cos(x)sin(y)prove csc^2(θ)tan^2(θ)-1=tan^2(θ)

Frequently Asked Questions (FAQ)

  • Is sin^2(θ)+cos^2(θ)=1 ?

    The answer to whether sin^2(θ)+cos^2(θ)=1 is True