Question

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Answer 1

Question is wrong .. it should contain multiply in between not minus sign

tan 9 . cot (90-27) . tan 63 . cot (90-81)


tan 9 . cot 63 . tan 63 . cot 9

tan 9 . cot 9 = 1

cot 63 . tan 63 = 1


Final Answer = 1


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Pranshu gupta