यदि $\sin x \cdot \cosh y = \cos \theta$ और $\cos x \cdot \sinh y = \sin \theta$ है,तो $\sin^2 x + \cosh^2 y = $

  • A
    $1$
  • B
    $2$
  • C
    $\frac{3}{2}$
  • D
    $\frac{1}{2}$

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समुच्चय $S = \{\theta \in [-4\pi, 4\pi] : 3 \cos^2 2\theta + 6 \cos 2\theta - 10 \cos^2 \theta + 5 = 0\}$ में अवयवों की संख्या है

$\sin\,10^o \sin\,30^o \sin\,50^o \sin\,70^o$ का मान है

$\cos \frac{2 \pi}{7}+\cos \frac{4 \pi}{7}+\cos \frac{6 \pi}{7}+\cos \frac{7 \pi}{7}$ का मान ज्ञात कीजिए।

$\sec {50^o} + \tan {50^o}$ का मान क्या है?

$\cos \frac{2 \pi}{7}+\cos \frac{4 \pi}{7}+\cos \frac{6 \pi}{7}$

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