$2{\tan ^{ - 1}}\left[ {\sqrt {\frac{{a - b}}{{a + b}}} \tan \frac{\theta }{2}} \right] = $

  • A
    ${\cos ^{ - 1}}\left( {\frac{{a\cos \theta + b}}{{a + b\cos \theta }}} \right)$
  • B
    ${\cos ^{ - 1}}\left( {\frac{{a + b\cos \theta }}{{a\cos \theta + b}}} \right)$
  • C
    ${\cos ^{ - 1}}\left( {\frac{{a\cos \theta }}{{a + b\cos \theta }}} \right)$
  • D
    ${\cos ^{ - 1}}\left( {\frac{{a\cos \theta + b\theta }}{{a + b\cos \theta }}} \right)$

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Similar Questions

$\tan \left[ {\frac{\pi }{4} + \frac{1}{2}{{\cos }^{ - 1}}\frac{a}{b}} \right] + \tan \left[ {\frac{\pi }{4} - \frac{1}{2}{{\cos }^{ - 1}}\frac{a}{b}} \right] = $

यदि $S = \{x \in R : \sin^{-1}\left(\frac{x+1}{\sqrt{x^2+2x+2}}\right) - \sin^{-1}\left(\frac{x}{\sqrt{x^2+1}}\right) = \frac{\pi}{4}\}$,तो $\sum_{x \in S} \left(\sin\left((x^2+x+5)\frac{\pi}{2}\right) - \cos((x^2+x+5)\pi)\right)$ का मान $........$ है।

कथन $(A): \operatorname{cosech}^{-1}(3) = \log \left(\frac{1+\sqrt{10}}{3}\right)$
कारण $(R): e^{\operatorname{cosech}^{-1} x}$ द्विघात समीकरण $x p^2 - 2p - x = 0$ का एक मूल है।
निम्नलिखित में से सही विकल्प चुनें।

मान ज्ञात कीजिए: ${\tan ^{ - 1}}x + {\cot ^{ - 1}}(x + 1)$

यदि $\sin ^{-1}\left(x-\frac{x^2}{2}+\frac{x^3}{4}-\ldots \infty\right) + \cos ^{-1}\left(x^2-\frac{x^4}{2}+\frac{x^6}{4}-\ldots \infty\right)=\frac{\pi}{2}$ और $0 < x < \sqrt{2}$ है,तो $x$ का मान ज्ञात कीजिए।

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