The value of sin ^{-1}left(-frac{1}{sqrt{2}}r | vedclass

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Question

(A) We use the properties of inverse trigonometric functions: $1$. $\sin ^{-1}(-x) = -\sin ^{-1}(x)$ $2$. $\cos ^{-1}(-x) = \pi - \cos ^{-1}(x)$ $3$.

Vedclass · Accepted Answer

$\frac{\pi}{12}$

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(A) We use the properties of inverse trigonometric functions: $1$. $\sin ^{-1}(-x) = -\sin ^{-1}(x)$ $2$. $\cos ^{-1}(-x) = \pi - \cos ^{-1}(x)$ $3$. $\cot ^{-1}(-x) = \pi - \cot ^{-1}(x)$ $4$. $	an ^{-1}(x)$ is standard. Evaluating each term: $\sin ^{-1}\left(-\frac{1}{\sqrt{2}}ight) = -\sin ^{-1}\left(\frac{1}{\sqrt{2}}ight) = -\frac{\pi}{4}$ $\cos ^{-1}\left(-\frac{1}{2}ight) = \pi - \cos ^{-1}\left(\frac{1}{2}ight) = \pi - \frac{\pi}{3} = \frac{2\pi}{3}$ $\cot ^{-1}\left(-\frac{1}{\sqrt{3}}ight) = \pi - \cot ^{-1}\left(\frac{1}{\sqrt{3}}ight) = \pi - \frac{\pi}{3} = \frac{2\pi}{3}$ $	an ^{-1}(\sqrt{3}) = \frac{\pi}{3}$ Substituting these values into the expression: $-\frac{\pi}{4} + \frac{2\pi}{3} - \frac{2\pi}{3} + \frac{\pi}{3} = -\frac{\pi}{4} + \frac{\pi}{3} = \frac{-\pi + 4\pi}{12} = \frac{\pi}{12}$ Thus,the correct option is $A$.

The value of $\sin ^{-1}\left(-\frac{1}{\sqrt{2}}\right)+\cos ^{-1}\left(-\frac{1}{2}\right)-\cot ^{-1}\left(-\frac{1}{\sqrt{3}}\right)+\tan ^{-1}(\sqrt{3})$ is:

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