Solution
prove
Solution
Solution steps
Manipulating right side
Rewrite using trig identities
Use the Product to Sum identity:
Simplify
Multiply fractions:
Cancel the common factor:
Refine
We showed that the two sides could take the same form
Popular Examples
prove (1-cos(2x))/(1+cos(2x))=tan^2(x)prove (1-sin(v))/(cos(v))+(cos(v))/(1-sin(v))=2sec(v)prove 9sec^2(θ)-5tan^2(θ)=5+4sec^2(θ)prove cot(2θ)=cot(θ)-1/2 sec(θ)csc(θ)prove tan(α)+cot(α)=sec(α)csc(α)
Frequently Asked Questions (FAQ)
Is cos(α+β)+cos(α-β)=2cos(α)cos(β) ?
The answer to whether cos(α+β)+cos(α-β)=2cos(α)cos(β) is True