Solution

prove

Solution

Solution steps
Manipulating left 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/(sec^2(θ))+1/(csc^2(θ))=1prove cos(x+pi)cos(x-pi)=cos^2(x)prove (1+tan^2(u))(1-sin^2(u))=1prove sec^3(x)= 1/(cos^3(x))prove 4cos^2(B)-4sin^2(B)=4-8sin^2(B)

Frequently Asked Questions (FAQ)

  • Is 2cos(x)cos(y)=cos(x+y)+cos(x-y) ?

    The answer to whether 2cos(x)cos(y)=cos(x+y)+cos(x-y) is True