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 cos(4a)=8cos^4(a)-8cos^2(a)+1prove 2cos^2(x)+cos(x)=0prove cos(2θ)=(1-tan^2(θ))/(sec^2(θ))prove sin^5(x)=(1-2cos^2(x)+cos^4(x))(sin(x))prove sin^2(t/2)=(1-cos(t))/2

Frequently Asked Questions (FAQ)

  • Is cos^2(7x)-sin^2(7x)=cos(14x) ?

    The answer to whether cos^2(7x)-sin^2(7x)=cos(14x) is True