જો $\sin \theta + \operatorname{cosec} \theta = 4$ હોય,તો $\sin^2 \theta + \operatorname{cosec}^2 \theta = $

  • A
    $12$
  • B
    $18$
  • C
    $16$
  • D
    $14$

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ધારો કે $f(\theta) = \sin \theta (\sin \theta + \sin 3\theta)$,તો $f(\theta)$

સમીકરણોની પ્રણાલી: $2x \cos^2 \theta + y \sin 2\theta - 2 \sin \theta = 0$,$x \sin 2\theta + 2y \sin^2 \theta = -2 \cos \theta$,અને $x \sin \theta - y \cos \theta = 0$,$\theta$ ના તમામ મૂલ્યો માટે,શું કરી શકે છે:

$\sinh ^{-1} 2 + \sinh ^{-1} 3 = x \Rightarrow \cosh x$ ની કિંમત શોધો.

ધારો કે $S = \{x \in R : \cos(x) + \cos(\sqrt{2}x) < 2\}$,તો

$\sum_{k=1}^3 \cos ^2\left((2 k-1) \frac{\pi}{12}\right)$ ની કિંમત શોધો.

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