$9\tan^2\theta + 4\cot^2\theta$ ની ન્યૂનતમ કિંમત કેટલી છે?

  • A
    $13$
  • B
    $9$
  • C
    $6$
  • D
    $12$

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$\cos^{3}\left(\frac{\pi}{8}\right) \cdot \cos\left(\frac{3\pi}{8}\right) + \sin^{3}\left(\frac{\pi}{8}\right) \cdot \sin\left(\frac{3\pi}{8}\right)$ ની કિંમત શોધો.

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જો $y = \frac{7 + 6 \tan x - \tan^2 x}{1 + \tan^2 x}$ ની મહત્તમ કિંમત $\lambda$ હોય,તો $\log_{\sqrt{2}}(\lambda)$ ની કિંમત શોધો.

જો $\sec \theta + \tan \theta = 2 + \sqrt{5}$ હોય,તો $\sin \theta$ ની કિંમત શોધો.

જો $\cos \theta = \frac{3}{5}$ અને $\cos \phi = \frac{4}{5}$ હોય,જ્યાં $\theta$ અને $\phi$ ધન લઘુકોણ છે,તો $\cos \frac{\theta - \phi}{2} = $

$\sin 15^\circ + \cos 105^\circ = $

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