કિંમત શોધો: $\cos^{-1}(\cos \frac{4\pi}{3}) + \sin^{-1}(\sin \frac{4\pi}{3}) = \dots$

  • A
    $\frac{4\pi}{3}$
  • B
    $\frac{8\pi}{3}$
  • C
    $\frac{\pi}{3}$
  • D
    $\frac{3\pi}{2}$

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$\cot \left(\sum_{n=1}^{23} \cot ^{-1}\left(1+\sum_{k=1}^n 2 k\right)\right)$ નું મૂલ્ય શોધો.

જો $4\sin^{-1}x + \cos^{-1}x = \pi$ હોય,તો $x$ ની કિંમત શોધો.

જો $x=\operatorname{cosec}(\tan ^{-1}(\cos (\cot ^{-1}(\sec (\sin ^{-1} a)))))$,જ્યાં $a \in [0, 1]$,તો નીચેનામાંથી કયું સાચું છે?

જો $\pi \leq x \leq 2 \pi$ હોય,તો $\cos^{-1}(\cos x)$ બરાબર શું થાય :-

$\tan ^{-1}\left(\frac{1}{3}\right)+\tan ^{-1}\left(\frac{1}{5}\right)+\tan ^{-1}\left(\frac{1}{7}\right)+\tan ^{-1}\left(\frac{1}{8}\right)$ નું મૂલ્ય શોધો.

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