Math, asked by kishan562, 1 year ago

cosec^2 50 - cot 50 . tan 50 + cos 80 / sin 10

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Answered by Anonymous

4

cosec²50 - cot50.tan50 + cos80/sin10

cosec²50 - tan50/tan50 + cos80/sin10 { cot A = 1/tan A}

cosec²50 - 1 + cos(90-10)/sin10

cosec²50 - 1+1 {cos(90 - A) = sin A}

cosec²50 ←Ans

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