સરવાળો શોધો: $\sum \frac{1}{1 + x^{a - b} + x^{a - c}}$

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    આમાંથી કોઈ નહીં

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જો $x = \log \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$ હોય, તો $\sinh x$ ની કિંમત શું થાય?

$\sin^6 \theta + \cos^6 \theta + 3 \sin^2 \theta \cos^2 \theta = $

$\cos \frac{2 \pi}{15} \cos \frac{4 \pi}{15} \cos \frac{8 \pi}{15} \cos \frac{14 \pi}{15}$ નું મૂલ્ય શું છે?

$\theta$ અને $\alpha$ એ $Q_3$ માં છે. જો $\cos (\theta-\alpha), \cos \theta, \cos (\theta+\alpha)$ હાર્મોનિક શ્રેણીમાં હોય,તો $\cos \theta \sec \frac{\alpha}{2} = $

$\cos^{3}\left(\frac{\pi}{8}\right) \cdot \cos\left(\frac{3\pi}{8}\right) + \sin^{3}\left(\frac{\pi}{8}\right) \cdot \sin\left(\frac{3\pi}{8}\right)$ ની કિંમત શોધો.

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