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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Similar Questions

જો $a \cos \theta + b \sin \theta = p$ અને $a \sin \theta - b \cos \theta = q$ હોય,તો $a, b, p$ અને $q$ વચ્ચેનો સંબંધ શું છે?

$\tan 75^\circ - \cot 75^\circ = $

$\frac{{\cot^2 15^\circ - 1}}{{\cot^2 15^\circ + 1}} = $

$\sin 75^\circ = $

જો $\left| a\sin^2 \theta + b\sin \theta \cos \theta + c\cos^2 \theta - \frac{1}{2}(a + c) \right| \le \frac{1}{2}k$ હોય,તો $k^2$ ની કિંમત શોધો.

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