Solution

prove

Solution

Solution steps
Manipulating left side
Rewrite using trig identities
Use the Double Angle identity:
We showed that the two sides could take the same form

Popular Examples

prove sin(θ)-cos^2(θ)sin(θ)=sin^3(θ)prove sec^2(x)+csc^2(x)=(sec(x)csc(x))^2prove (1+sin(x))/(sin(x))=1+csc(x)prove cos(2y)=(1-tan^2(y))/(1+tan^2(y))prove 5sec^2(x)+4=9sec^2(x)-4tan^2(x)

Frequently Asked Questions (FAQ)

  • Is sin(40)=2sin(20)cos(20) ?

    The answer to whether sin(40)=2sin(20)cos(20) is True