3) (cos? A - 1)(cot? A + 1) =A) -1B). 1C) 2D) -2
Added by Sandra T.
Step 1
First, we can use the identity cot^2(A) = 1 + tan^2(A) to rewrite cot(A) + 1 as (1 + tan^2(A))/(tan(A)). Show more…
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