Solution
prove
Solution
Solution steps
Manipulating left side
Rewrite using trig identities
Use the Double Angle identity:
Simplify
We showed that the two sides could take the same form
Popular Examples
prove 1+cot^2(30)=csc^2(30)prove tan(pi/4-t)=(1-tan(t))/(1+tan(t))prove-tan(x)=tan(-x)prove sin(3θ)=3cos^2(θ)sin(θ)-sin^3(θ)prove sin(x)sin(3x)=4sin(x)cos^2(x)
Frequently Asked Questions (FAQ)
Is cos^2(9x)-sin^2(9x)=cos(18x) ?
The answer to whether cos^2(9x)-sin^2(9x)=cos(18x) is True