Quick Writer
Welcome to Questions & Answers on Math, Physics, Chemistry, History and more, where you can ask questions and receive answers from other members of the community.

Sum and difference Identities

I need to use sum and difference identities to find cos(11pi/12)

I think, it can be expressed as

cos(α+β)=cos(α)cos(β)−sin(α)sin(β)
asked Aug 10, 2017 in Algebra by Eliana

Please log in or register to answer this question.

Questions and Answers by QuickWriter.com
...