Question

$\purple{Prove-That}$
(1-cosA)(1-secA)(1+cosecA)(1+cosA)=cosA​

Answer 1

Step-by-step explanation:

(1+cosecA)(1- cosecA ) = 1-cosec²a

1-cosec²a = -tan²a

(cosa-1)(cosa+1)=cos²a-1=sin²a

(-sin²a/cos²a )(sin²a)

cosa

Answer 2

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