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Question

tan 55cot 55 × sin 30 = A

Find the value of 2A.


Solution

tan 55cot55 × sin 30 = A

 tan 55tan(9035) × sin 30 = A  (Since, tan(90 - A) = cotA)

tan 55tan 55 × 12 = A

A = 12

2A =1

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