Prove: TanA+2Tan2A+4Tan4A+8Cot8A=CotA

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1. Prove: TanA+2Tan2A+4Tan4A+8Cot8A=CotA
   1. 1 answer
2. Prove: tanA+2tan2A+4tan4A+8cot8A=cotA
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3. tanA+4cotA=4 find the value of tanA*tanA+cotA*cotA
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4. Prove sqrt(Sec^2 A+Cosec^2 A)=TanA+CotA
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