TS EAMCET · Maths · Inverse Trigonometric Functions
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Correct Answer
(A)
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Detailed explanation
Given, coth-1(2)+cosech-1(-22)=coth-1(2)-cosech-1(22) coth-12=12log2+12-1=12log3=log3 (As coth-1x=12logx+1x-1) cosech-122=log1+222+122=log422=log2 (As cosech-1x=log1+x2+1x) ⇒coth-1(2)-cosech-1(22)=log3-log2=log32
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