5.3 (Sum & Difference Formulas) Flashcards
1
Q
What is the cosine sum and difference formula?
A
cos(α +/- β)=cosαcosβ -/+ sinαsinβ
2
Q
What is the sine sum and difference formula?
A
sin(α +/- β)=sinαcosβ +/- cosαsinβ
3
Q
What is the tangent sum and difference formula?
A
tan(α +/- β)=(tanα +/- tanβ)/(1 -/+ tanαtanβ)