यदि $\cos \theta = \frac{-3}{5}$ और $\pi < \theta < \frac{3\pi}{2}$ है,तो $\tan \frac{\theta}{2} + \sin \frac{\theta}{2} + 2 \cos \frac{\theta}{2} =$

  • A
    $-1$
  • B
    $1$
  • C
    $-2$
  • D
    $2$

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यदि $\cos ^3 x \sin 4 x = \sum_{r=0}^{n} a_{r} \sin rx$ सभी $x \in R$ के लिए है,तो $a_3+a_5 : a_1+a_7 = $

यदि $\frac{\tan 3A}{\tan A} = a$ है,तो $\frac{\sin 3A}{\sin A}$ का मान ज्ञात कीजिए।

$\cos \frac{\pi}{2^2} \cdot \cos \frac{\pi}{2^3} \cdot \dots \cdot \cos \frac{\pi}{2^{10}} \cdot \sin \frac{\pi}{2^{10}}$ का मान है

यदि $\tan A = \frac{1 - \cos B}{\sin B}$ है,तो $\tan B$ के पदों में $\tan 2A$ ज्ञात कीजिए।

यदि $\alpha = \frac{180^{\circ}}{7}$ है,तो $3 \sin \alpha - 4 \sin^{3} \alpha$ का मान क्या होगा?

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