कुछ $a, b, c \in R$ के लिए,यदि $\sin 5 \theta = a \cos^4 \theta \sin \theta + b \cos^2 \theta \sin^3 \theta + c \sin^5 \theta$ है,तो $abc =$

  • A
    -$10$
  • B
    $10$
  • C
    $0$
  • D
    -$50$

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$\frac{1-\cos 2 \theta+\sin 2 \theta}{1+\cos 2 \theta+\sin 2 \theta}=$

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$\tan 3A - \tan 2A - \tan A = $

यदि $\cos \theta = \frac{1}{2}\left( x + \frac{1}{x} \right)$ है,तो $\frac{1}{2}\left( x^2 + \frac{1}{x^2} \right) = $

$\frac{\sqrt{1 + \sin x} + \sqrt{1 - \sin x}}{\sqrt{1 + \sin x} - \sqrt{1 - \sin x}} = $ (जब $x$ द्वितीय चतुर्थांश में स्थित हो)

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