यदि $\cos 40^\circ = x$ और $\cos \theta = 1 - 2x^2$ है,तो $0^\circ$ और $360^\circ$ के बीच $\theta$ के संभावित मान क्या हैं?

  • A
    $100^\circ$ और $260^\circ$
  • B
    $80^\circ$ और $280^\circ$
  • C
    $280^\circ$ और $110^\circ$
  • D
    $110^\circ$ और $260^\circ$

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Similar Questions

सिद्ध कीजिए कि $\sin 2x + 2 \sin 4x + \sin 6x = 4 \cos^2 x \sin 4x$.

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) = $

यदि $\text{cosec} \theta = \frac{p + q}{p - q}$ है,तो $\cot \left( \frac{\pi}{4} + \frac{\theta}{2} \right) = $

$\sin^{2}\left(\frac{\pi}{8}\right)$ का मान =

यदि $\cos \theta = \frac{-3}{5}$ और $\pi < \theta < \frac{3 \pi}{2}$ है,तो $\tan \left(\frac{\theta}{2}\right) = $

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