inv-trig

Related Questions

• ${{\sec }^{-1}}[\sec (-{{30}^{o}})]=$

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• If ${{\tan }^{-1}}x+2{{\cot }^{-1}}x=\frac{2\pi }{3},$then x =

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• $2{{\tan }^{-1}}\left( \frac{1}{3} \right)+{{\tan }^{-1}}\left( \frac{1}{7} \right)=$

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• $\sin \left\{ {{\sin }^{-1}}\frac{1}{2}+{{\cos }^{-1}}\frac{1}{2} \right\}=$

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• If $2{{\cos }^{-1}}\sqrt{\frac{1+x}{2}}=\frac{\pi }{2},$then $x=$

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