Solution

prove

Solution

Solution steps
Manipulating left side
Use the negative angle identity:
Simplify
Manipulating right side
Simplify
We showed that the two sides could take the same form

Popular Examples

prove sin(u)cos(u)= 1/2 sin(2u)prove tan(2x)cos(2x)=sin(2x)prove tan(x)=2sin(x)prove (1-sin^4(a))/(cos^2(a))=2-cos^2(a)prove (sin(2x)+sin(4x))/(cos(2x)+cos(4x))=tan(3x)

Frequently Asked Questions (FAQ)

  • Is cos(-pi/4)=sin(pi/4) ?

    The answer to whether cos(-pi/4)=sin(pi/4) is True