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

  • A
    $-1$
  • B
    $\frac{1}{6}$
  • C
    $-1, \frac{1}{6}$
  • D
    આમાંથી કોઈ નહીં

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જો $x * y = x^{2} + y^{3}$ અને $(x * 1) * 1 = x * (1 * 1)$ હોય,તો $2 \sin^{-1}\left(\frac{x^{4} + x^{2} - 2}{x^{4} + x^{2} + 2}\right)$ ની કિંમત શોધો.

જો $\cot^{-1} \alpha + \cot^{-1} \beta = \cot^{-1} x$ હોય,તો $x = $

$\cot \left[\sum_{n=3}^{32} \cot ^{-1}\left(1+\sum_{k=1}^n 2 k\right)\right]=$

શ્રેણી $\cot^{-1} 3 + \cot^{-1} 7 + \cot^{-1} 13 + \cot^{-1} 21 + \dots$ ના પ્રથમ $n$ પદોનો સરવાળો શું થાય?

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$\tan ^2(\sec ^{-1} 4) + \cot ^2(\operatorname{cosec}^{-1} 3)$ નું મૂલ્ય શોધો.

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