Solution

prove

Solution

Solution steps
Use the Angle Sum identity:

Popular Examples

prove sin(u)csc(u)-cos^2(u)=sin^2(u)prove 1-tan^2(x)=(cos(2x))/(cos^2(x))prove sin^2(-θ)+cos^2(-θ)=1prove sin(2x)=sin(x+x)prove 8cos^4(x)-8cos^2(x)+1=cos(4x)

Frequently Asked Questions (FAQ)

  • Is sin(x+y)=sin(x)cos(y)+cos(x)sin(y) ?

    The answer to whether sin(x+y)=sin(x)cos(y)+cos(x)sin(y) is True