જો $\cos ^{-1} 2x + \cos ^{-1} 3x = \frac{\pi}{3}$ અને $4x^2 = \frac{a}{b}$ હોય,તો $a + b =$

  • A
    $12$
  • B
    $11$
  • C
    $31$
  • D
    $10$

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Similar Questions

કિંમત શોધો: $\cos ^{-1}\left(\frac{4}{5}\right)+\cos ^{-1}\left(\frac{12}{13}\right)$

ધારો કે $S$ એ સમીકરણ $\cos ^{-1}(2 x)-2 \cos ^{-1}\left(\sqrt{1-x^2}\right)=\pi$ ના તમામ ઉકેલોનો ગણ છે,જ્યાં $x \in\left[-\frac{1}{2}, \frac{1}{2}\right]$. તો $\sum_{x \in S} 2 \sin ^{-1}\left(x^2-1\right)$ ની કિંમત શોધો.

જો $\tan^{-1} 2x + \tan^{-1} 3x = \frac{\pi}{4}$ હોય,તો $x =$

$\theta \in \left(0, \frac{\pi}{2}\right)$ માટે,$\operatorname{sech}^{-1}(\cos \theta)$ ની કિંમત શોધો.

સાબિત કરો કે $2 \sin ^{-1} \frac{3}{5} = \tan ^{-1} \frac{24}{7}$.

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