જો $x = \cos 10^\circ \cos 20^\circ \cos 40^\circ$ હોય,તો $x$ નું મૂલ્ય શું થાય?

  • A
    $\frac{1}{4} \tan 10^\circ$
  • B
    $\frac{1}{8} \cot 10^\circ$
  • C
    $\frac{1}{8} \csc 10^\circ$
  • D
    $\frac{1}{8} \sec 10^\circ$

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જો $\tan x = \frac{3}{4}$ અને $\pi < x < \frac{3\pi}{2}$ હોય,તો $\cos \frac{x}{2}$ ની કિંમત શોધો.

જો $\cos^3 \theta + \cos^3 \left(\frac{2 \pi}{3} + \theta\right) + \cos^3 \left(\frac{4 \pi}{3} + \theta\right) = \alpha \cos 3 \theta$ હોય,તો $\alpha$ ની કિંમત શોધો.

જો $k = \sin \frac{\pi}{18} \cdot \sin \frac{5\pi}{18} \cdot \sin \frac{7\pi}{18}$ હોય,તો $k$ નું આંકડાકીય મૂલ્ય શું છે?

$\cos \frac{\pi }{7} \cos \frac{2\pi }{7} \cos \frac{4\pi }{7} = $

$\tan 20^\circ \cot 10^\circ \cot 50^\circ$ ની કિંમત શોધો.

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