Solution

prove

Solution

Solution steps
Use the Pythagorean identity:

Popular Examples

prove tan(x+pi/3)=(tan(x)+sqrt(3))/(1-sqrt(3)tan(x))prove (1-2sin^2(x))/(1-sin^2(x))=1-tan(2x)prove sin(x+y)-sin(x-y)=2sin(y)cos(x)prove sin(2a)=2cos(a)sin(a)prove sin(2α)=(2tan(α))/(1+tan^2(α))

Frequently Asked Questions (FAQ)

  • Is cos^2(2t)+sin^2(2t)=1 ?

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