જો $\cos \theta = \frac{1}{2}\left( a + \frac{1}{a} \right)$ હોય,તો $\cos 3\theta$ ની કિંમત શોધો.

  • A
    $\frac{1}{8}\left( a^3 + \frac{1}{a^3} \right)$
  • B
    $\frac{3}{2}\left( a + \frac{1}{a} \right)$
  • C
    $\frac{1}{2}\left( a^3 + \frac{1}{a^3} \right)$
  • D
    $\frac{1}{3}\left( a^3 + \frac{1}{a^3} \right)$

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Similar Questions

જો $\sec x + \tan x = 2$,જ્યાં $0 < x < \frac{\pi}{2}$ હોય,તો $\sin \frac{x}{4}$ ની કિંમત શોધો.

જો $A = 133^\circ$ હોય,તો $2\cos \frac{A}{2}$ ની કિંમત કેટલી થાય?

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

$\sin 4\theta$ ને કેવી રીતે લખી શકાય?

જો $\sinh x = \frac{5}{12}$ હોય,તો $\cosh \frac{x}{2} =$

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