Reciprocal, Quotient, Pythagorean, Even and Odd, Algebraic

cos(x-y)/cos x cos y = 1 + tan x  tan y

Indicate each step of your process in the “Statement” column. 

A. Identify the problem statement.

B. Correctly use the identities and/or theorems. 

C. Correctly use the algebraic process. 

D. Identify the final statement. 

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