$(1 - \tan 348^{\circ})(1 + \cot 417^{\circ})$ ની કિંમત શોધો.

  • A
    $3 \sqrt{3}$
  • B
    $2$
  • C
    $\frac{2}{\sqrt{3}}$
  • D
    $1$

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જો $x = \log \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$ હોય, તો $\sinh x$ ની કિંમત શું થાય?

ધારો કે $\frac{\pi}{2} < x < \pi$ એવું છે કે જેથી $\cot x = \frac{-5}{\sqrt{11}}$. તો $\left(\sin \frac{11x}{2}\right)(\sin 6x - \cos 6x) + \left(\cos \frac{11x}{2}\right)(\sin 6x + \cos 6x)$ ની કિંમત શોધો.

જો $\cos A+\cos (A+B)+\cos (A+2 B)+\ldots$ $n$ પદો સુધી $=$ $\cos \left(\frac{2 A+(n-1) B}{2}\right) \sin \frac{n B}{2} \operatorname{cosec} \frac{B}{2}$ હોય,તો $\cos \frac{\pi}{19}+\cos \frac{3 \pi}{19}+\cos \frac{5 \pi}{19}+\ldots+\cos \frac{17 \pi}{19} = $

ગુણાકાર $(1+\tan 1^{\circ})(1+\tan 2^{\circ})(1+\tan 3^{\circ}) \dots (1+\tan 45^{\circ})$ બરાબર શું થાય?

પદાવલિ $\cos^2 \phi + \cos^2(\theta + \phi) - 2 \cos \theta \cos \phi \cos(\theta + \phi)$ એ

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