Question

Complete the identity. cos(α-β)/cos α cos β = ?
A. 1 + cot α cot β
B. tan α tan β + cot β
C. 1 + tan α tan β
D. 1 + cot α tan β

Answer 1

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Answer 2

I am thinking C?

Answer 3

The ans is C.

Answer 4

thank you @studystagram

Answer 5

C

Answer 6

Thank you @AnswerMyQuestions