inv-trig

Related Questions

• $\tan \left[ {{\cos }^{-1}}\frac{4}{5}+{{\tan }^{-1}}\frac{2}{3} \right]$=

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• If ${{x}^{2}}+{{y}^{2}}+{{z}^{2}}={{r}^{2}}$, then ${{\tan }^{-1}}\left( \frac{xy}{zr} \right)+$ ${{\tan }^{-1}}\left( \frac{yz}{xr} \right)+\tan \left( \frac{zx}{yr} \right)=$

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• $1+{{\cot }^{2}}({{\sin }^{-1}}x)=$

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

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• If $2{{\tan }^{-1}}(\cos x)={{\tan }^{-1}}(2\text{cosec }x),$ then x =

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