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AP EAMCET · Maths · Inverse Trigonometric Functions

\(\operatorname{Tanh}^{-1}\left(\frac{1}{3}\right)+\operatorname{Coth}^{-1}(3)=\)

  1. A \(\operatorname{Sech}^{-1}\left(\frac{1}{3}\right)\)
  2. B \(\operatorname{Cosech}^{-1}\left(\frac{1}{3}\right)\)
  3. C \(\operatorname{Cosh}^{-1}\left(\frac{4}{3}\right)\)
  4. D \(\operatorname{Sinh}^{-1}\left(\frac{3}{4}\right)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\operatorname{Sinh}^{-1}\left(\frac{3}{4}\right)\)

Step-by-step Solution

Detailed explanation

\(\operatorname{Coth}^{-1}(3) = \operatorname{Tanh}^{-1}\left(\frac{1}{3}\right)\) \(\operatorname{Tanh}^{-1}\left(\frac{1}{3}\right)+\operatorname{Tanh}^{-1}\left(\frac{1}{3}\right) = 2\operatorname{Tanh}^{-1}\left(\frac{1}{3}\right)\)…