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Prove tan 2A = cot (A-18) |
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Answer» A= 36 tan 2A =cot(A-18)tan(90-2A) =cot(A-18)Cot(90-2A)=cot(A-18)90-2A=A-1890+18 =A+2A108= 3AA=108\\3A=36 |
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