Math, asked by bishaall6204, 4 months ago

Prove:
tanA+2tan2A+4tan4a+8cot84=cot

Answers

Answered by jiya8489

1

ANSWER

Transfer tanA to RHS

∴2tan2A+4tan4A+8cot8A=cotA−tanA=2cot2A

∴4tan4A+8cot8A=2(cot2A−tan2A)=2.2cot4A

∴8cot8A=4[cot4A−tan4A]=4.2cot8A=8cot8A

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