પદાવલિ $(1 + \tan x + \tan^2 x)(1 - \cot x + \cot^2 x)$ માટે $x$ ની કઈ કિંમતો માટે ધન મૂલ્યો મળે છે?

  • A
    $0 \le x \le \frac{\pi}{2}$
  • B
    $0 \le x \le \pi$
  • C
    બધા $x \in \mathbb{R}$ માટે
  • D
    $x \ge 0$

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$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta)^2} = $

$\cos \frac{2\pi}{28} \csc \frac{3\pi}{28} + \cos \frac{6\pi}{28} \csc \frac{9\pi}{28} + \cos \frac{18\pi}{28} \csc \frac{27\pi}{28}$ નું ચોક્કસ મૂલ્ય શું છે?

જો $\sin x + \sin^2 x = 1$ હોય,તો $\cos^8 x + 2\cos^6 x + \cos^4 x = $

જો $\tan 15^{\circ}+\frac{1}{\tan 75^{\circ}}+\frac{1}{\tan 105^{\circ}}+\tan 195^{\circ}=2a$ હોય,તો $\left(a+\frac{1}{a}\right)$ ની કિંમત શોધો:

જો $\operatorname{sech}^{-1} x = \log 2$ અને $\operatorname{cosech}^{-1} y = -\log 3$ હોય,તો $(x + y) = $

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