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Prove: (1+cot^2theta)sin^2A=1...

Prove: `(1+cot^2theta)sin^2A=1`

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S CHAND IIT JEE FOUNDATION-TRIGONOMETRICAL RATIOS -Self Assessment Sheet - 40
  1. Prove: (1+cot^2theta)sin^2A=1

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  2. Which of the following is not an identity ?

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