Solution

prove

Solution

Solution steps
Use the Angle Sum identity:

Popular Examples

prove tan^2(A)+1=(sec(A))/(cos(A))prove prove (2cot(x))/(1+cot^2(x))=sin(2x)prove prove tan^2(x)-sin^2(x)=tan(x)sin(x)prove prove sec(-x)=-sec(x)prove prove ((sin^2(x)))/(1-cos(x))=1+cos(x)prove

Frequently Asked Questions (FAQ)

  • Is cos(A+B)=cos(A)cos(B)-sin(A)sin(B) ?

    The answer to whether cos(A+B)=cos(A)cos(B)-sin(A)sin(B) is True