Let = 1 60^ 61^ + 1 62^ 63^ + + 1 118^ 119^ . Then the value of ( cosec ,1^ )^2 is _____.

JEE Advanced 2025 Mathematics question

Let

α = + + ·s + .

Then the value of

(

is .

Answer: 3

, so . Since and k, 180 − k have the same parity, the

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Question ID VK-035480