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.

  • A
    $0$
  • B
    $6$
  • C
    $8$
  • D
    $1$

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$\frac{\sin^3 \theta - \cos^3 \theta}{\sin \theta - \cos \theta} - \frac{\cos \theta}{\sqrt{1 + \cot^2 \theta}} - 2 \tan \theta \cot \theta = -1$ જો

$\cos^2 \frac{\pi}{12} + \cos^2 \frac{\pi}{4} + \cos^2 \frac{5\pi}{12}$ નું મૂલ્ય શોધો.

જો $\sin \theta + \sin \phi = a$ અને $\cos \theta + \cos \phi = b$ હોય,તો $\tan \frac{\theta - \phi}{2}$ ની કિંમત શોધો.

જો $\sin \theta_1 + \sin \theta_2 + \sin \theta_3 = 3$ હોય,તો $\cos \theta_1 + \cos \theta_2 + \cos \theta_3 =$

$\sin 12^\circ \sin 48^\circ \sin 54^\circ = $

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