Solution
Solution
Solution steps
Manipulating left side
Rewrite using trig identities
We showed that the two sides could take the same form
Popular Examples
prove (1-cos(θ))(1-cos(θ))= 1/(csc^2(θ))prove cot(-θ)=-cot(θ)prove sin^2(15x)+cos^2(15x)=1prove cos(2x)cos(x)-sin(2x)sin(x)=4cos^3(x)-3cos(x)prove ((cot(x)+tan(x)))/(csc(x))=sec(x)
Frequently Asked Questions (FAQ)
Is cos(φ+a)-cos(φ-a)=-2sin(φ)sin(a) ?
The answer to whether cos(φ+a)-cos(φ-a)=-2sin(φ)sin(a) is True