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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