જો નિત્યસમ $\cos^4 \theta = a \cos 4\theta + b \cos 2\theta + c$ અમુક $a, b, c \in \mathbb{Q}$ માટે સાચું હોય,તો $(a, b, c) =$

  • A
    $\left(\frac{1}{8}, \frac{1}{2}, \frac{3}{8}\right)$
  • B
    $\left(\frac{1}{8}, \frac{1}{2}, \frac{3}{8}\right)$
  • C
    $\left(\frac{1}{2}, \frac{1}{8}, \frac{3}{8}\right)$
  • D
    $\left(\frac{1}{2}, \frac{3}{8}, \frac{1}{8}\right)$

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$\tan A + 2 \tan 2A + 4 \tan 4A + 8 \cot 8A = $

જો $x \in \left(-\frac{\pi}{2}, \frac{\pi}{2}\right)$ હોય,તો $\log \sec x = $

જો $\cos A = \frac{7}{25}$ અને $\frac{3 \pi}{2} < A < 2 \pi$ હોય,તો $\cos \frac{A}{4} + \cos \frac{A}{2} - \cos 2A =$

જો $\tan x + \tan \left( \frac{\pi}{3} + x \right) + \tan \left( \frac{2\pi}{3} + x \right) = 3$ હોય,તો

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