यदि $a \sin \theta = b \cos \theta$,जहाँ $a, b \neq 0$,तो $a \cos 2 \theta + b \sin 2 \theta = $

  • A
    $ab$
  • B
    $a$
  • C
    $b$
  • D
    $\frac{a}{b}$

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यदि $\frac{\sec 8\theta - 1}{\sec 4\theta - 1} = \frac{a + b \tan^2 2\theta}{1 + c \tan^2 2\theta + d \tan^4 2\theta}$ (जहाँ $\theta \neq \frac{n\pi}{16}, n \in I$),तो $(a - b + c - d)$ का मान ज्ञात कीजिए।

यदि $x + \frac{1}{x} = 2 \cos \theta$ है,तो $x^3 + \frac{1}{x^3} = $

$\sqrt{\frac{1 - \sin A}{1 + \sin A}} = $

$\frac{\sec 8\theta - 1}{\sec 4\theta - 1}$ किसके बराबर है?

मान ज्ञात कीजिए: $\csc A - 2 \cot 2A \cos A$

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