Question

Simplity cot^2A-1/sin^2A​

Answer 1

Answer:

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Answer 2

Answer:

Step-by-step ex/planation:

cot²2A-1/sin²2A=cos²2A/sin²2A-1/sin²2A

                        = cos²2A-1/sin²2A

                       =-sin²2A/sin²2A  (cos²2A-1=-sin²2A)

                       =-1

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