$\mathbb{R}$ पर $4 \cos \left(x^2\right) \cos \left(\frac{\pi}{3}+x^2\right) \cos \left(\frac{\pi}{3}-x^2\right)$ के चरम मान क्या हैं?

  • A
    $-1, 1$
  • B
    $-2, 2$
  • C
    $-3, 3$
  • D
    $-4, 4$

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मान लीजिए $f(x) = \frac{\sin(x-a) + \sin(x+a)}{\cos(x-a) - \cos(x+a)}$,तो

यदि $\cos x+\cos y+\cos \alpha=0$ और $\sin x+\sin y+\sin \alpha=0$ है,तो $\cot \left(\frac{x+y}{2}\right)$ का मान ज्ञात कीजिए।

यदि $\cos x+\cos y=p$ और $\sin x+\sin y=q$ है,तो $\cos \left(\frac{x-y}{2}\right) = $

यदि $\cos x + \cos y = -\cos \alpha$ और $\sin x + \sin y = -\sin \alpha$ है,तो $\cot \left(\frac{x+y}{2}\right) = $

सिद्ध कीजिए कि: $(\sin 3x + \sin x) \sin x + (\cos 3x - \cos x) \cos x = 0$

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