Question

Evaluate :- cosec^2 50°-cot50°×tan40°+(cos80°/sin10°)

Answer 1

Step-by-step explanation:

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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