જો $|\cos \theta \{\sin \theta + \sqrt{\sin^2 \theta + \sin^2 \alpha}\}| \le k$ હોય,તો $k$ નું મૂલ્ય શું થાય?

  • A
    $\sqrt{1 + \cos^2 \alpha}$
  • B
    $\sqrt{1 + \sin^2 \alpha}$
  • C
    $\sqrt{2 + \sin^2 \alpha}$
  • D
    $\sqrt{2 + \cos^2 \alpha}$

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સમીકરણ $\sec^2 \theta = \frac{4xy}{(x + y)^2}$ માત્ર ત્યારે જ શક્ય છે જ્યારે

જો $\tan A = n \tan B$ અને $\sin A = m \sin B$ હોય,તો $\cos ^{2} A$ ની કિંમત શોધો.

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$\cos 2(\theta + \phi ) - 4\cos (\theta + \phi )\sin \theta \sin \phi + 2{\sin ^2}\phi = $

$\sin ^2 \frac{\pi }{8} + \sin ^2 \frac{3\pi }{8} + \sin ^2 \frac{5\pi }{8} + \sin ^2 \frac{7\pi }{8} = $

જો $x = \sec \theta + \tan \theta$ હોય,તો $x + \frac{1}{x} = $

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