જો $\cos \theta - \sin \theta = \sqrt{2} \sin \theta$ હોય,તો $\cos \theta + \sin \theta$ ની કિંમત કેટલી થાય?

  • A
    $\sqrt{2} \cos \theta$
  • B
    $\sqrt{2} \sin \theta$
  • C
    $2 \cos \theta$
  • D
    $-\sqrt{2} \cos \theta$

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$\left( {1 + \cos \frac{\pi }{8}} \right)\,\left( {1 + \cos \frac{{3\pi }}{8}} \right)\,\left( {1 + \cos \frac{{5\pi }}{8}} \right)\,\left( {1 + \cos \frac{{7\pi }}{8}} \right) = $

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$x = 1 - x + x^2 - x^3 + x^4 - x^5 + \dots \infty$ સંબંધનું પાલન કરતી $x$ ની કિંમત શોધો.

ધારો કે $A = \{ \theta : 2\cos^2 \theta + \sin \theta \le 2 \}$ અને $B = \{ \theta : \frac{\pi}{2} \le \theta \le \frac{3\pi}{2} \}$,તો $A \cap B$ શું થાય?

જો $a^2 + 2a + \csc^2 \left( \frac{\pi}{2}(a + x) \right) = 0$ હોય,તો નીચેનામાંથી કયું સાચું છે?

જો $A$ અને $B$ કોટિકોણ હોય,તો:

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