જો $\cos ^3 x \sin 4 x = \sum_{r=0}^{n} a_{r} \sin rx$ તમામ $x \in R$ માટે હોય,તો $a_3+a_5 : a_1+a_7 = $

  • A
    $1 : 3$
  • B
    $1 : 1$
  • C
    $2 : 1$
  • D
    $3 : 1$

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Similar Questions

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.

કિંમત શોધો: $\cos^2 A(3 - 4\cos^2 A)^2 + \sin^2 A(3 - 4\sin^2 A)^2$

$\cos 15^\circ = $

જો $\sqrt{\frac{1+\cos A}{1-\cos A}}=\frac{x}{y}$ હોય,તો $\tan A$ ની કિંમત કેટલી થાય?

$\frac{\sin 5 \theta}{\sin \theta}$ ની કિંમત શું થાય?

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