Question

(cosecA+sinA) (cosecA-sinA) =cot²A+cos²A​

Answer 1

(cosec A+sin A) (cosecA-sinA)

= cosec^2 A - sin^2 A

= (cot^2 A + 1) - (1 - cos^ 2A)

= cot^2A + cos^2A

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Ideas: Use the identity cosec^2 A = cot^2 A + 1

Answer 2

Answer:

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