ધારો કે $\theta, \phi \in [0, 2\pi]$ એવા છે કે $2 \cos \theta(1-\sin \phi) = \sin^2 \theta \left(\tan \frac{\theta}{2} + \cot \frac{\theta}{2}\right) \cos \phi - 1$,$\tan (2\pi - \theta) > 0$ અને $-1 < \sin \theta < -\frac{\sqrt{3}}{2}$. તો $\phi$ કઈ શરતનું પાલન કરી શકતું નથી?

  • A
    $0 < \phi < \frac{\pi}{2}$
  • B
    $\frac{\pi}{2} < \phi < \frac{4\pi}{3}$
  • C
    $\frac{4\pi}{3} < \phi < \frac{3\pi}{2}$
  • D
    $\frac{3\pi}{2} < \phi < 2\pi$

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Similar Questions

જો $x=\log _e\left[\cot \left(\frac{\pi}{4}+\theta\right)\right]$ અને $\theta \in\left(\frac{-\pi}{4}, \frac{\pi}{4}\right)$ હોય,તો નીચેના વિધાનો ધ્યાનમાં લો:
$I$. $\cosh x=\sec 2 \theta$
$II$. $\sinh x=-\tan 2 \theta$

$0 < \theta < \frac{\pi}{2}$ માટે,$\sum_{m=1}^6 \operatorname{cosec}\left(\theta+\frac{(m-1) \pi}{4}\right) \operatorname{cosec}\left(\theta+\frac{m \pi}{4}\right) = 4 \sqrt{2}$ ના ઉકેલ(ઓ) છે:

$\sum_{k=1}^3 \cos ^2\left((2 k-1) \frac{\pi}{12}\right)$ ની કિંમત શોધો.

જો $\sin \theta + \sin \phi = a$ અને $\cos \theta + \cos \phi = b$ હોય,તો $\tan \frac{\theta - \phi}{2}$ ની કિંમત શોધો.

જો $\cos^3 80^{\circ} + \cos^3 40^{\circ} - \cos^3 20^{\circ} = k$ હોય,તો $\frac{4k}{3} =$

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