inv-trig

Related Questions

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

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• If ${{\sin }^{-1}}a+{{\sin }^{-1}}b+{{\sin }^{-1}}c=\pi ,$ then the value of $a\sqrt{(1-{{a}^{2}})}+b\sqrt{(1-{{b}^{2}})}+c\sqrt{(1-{{c}^{2}})}$ will be

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• ${{\cot }^{-1}}3+\text{cose}{{\text{c}}^{-1}}\sqrt{5}$=

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

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• $4{{\tan }^{-1}}\frac{1}{5}-{{\tan }^{-1}}\frac{1}{239}$is equal to

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