1.

If cot²A =sin (A-15°) find A​

Answer»

Answer:

cot²A = cosec²A - 1

⇒ cosec²A - 1 = SIN (A - 15)

⇒ 1 - sin²A ÷ sin²A = sin (A - 15)

⇒ 1 - sin²A = sin³A (A - 15)

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