inv-trig

Related Questions

• $\tan \left[ {{\sec }^{-1}}\sqrt{1+{{x}^{2}}} \right]=$

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• If $\pi \le x\le 2\pi $, then ${{\cos }^{-1}}(\cos x)$is equal to

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• If $3{{\sin }^{-1}}\frac{2x}{1-{{x}^{2}}}-4{{\cos }^{-1}}\frac{1-{{x}^{2}}}{1+{{x}^{2}}}+2{{\tan }^{-1}}\frac{2x}{1-{{x}^{2}}}=\frac{\pi }{3}$ then $x$ =

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• $\cos \text{ }\left[ {{\cos }^{-1}}\text{ }\left( \frac{-1}{7} \right)+{{\sin }^{-1}}\text{ }\left( \frac{-1}{7} \right) \right]=$

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• If ${{\tan }^{-1}}\frac{x-1}{x+2}+{{\tan }^{-1}}\frac{x+1}{x+2}=\frac{\pi }{4}$, then $x =$

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