Solution

prove

Solution

Solution steps
Use the Product to Sum identity:

Popular Examples

prove sin^2(θ)(cot^2(θ)+1)=1prove prove sin(a-b)=sin(a)cos(b)-cos(a)sin(b)prove prove (sin(θ)+tan(θ))/(cos(θ)+1)=tan(θ)prove prove 2+sec(A)cos(A)=3prove prove 2/(cos(x))=2sec(x)prove

Frequently Asked Questions (FAQ)

  • Is cos(a)cos(b)= 1/2 (cos(a-b)+cos(a+b)) ?

    The answer to whether cos(a)cos(b)= 1/2 (cos(a-b)+cos(a+b)) is True