જો $x$ વાસ્તવિક હોય અને $x+\frac{1}{x}=2 \cos \theta$ હોય,તો $\cos \theta=$

  • A
    $\pm \frac{1}{2}$
  • B
    $\pm \frac{1}{3}$
  • C
    $\pm 1$
  • D
    આમાંથી કોઈ નહીં

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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

જો $\alpha, \beta, \gamma \in \left( 0, \frac{\pi}{2} \right)$ હોય,તો $\frac{\sin(\alpha + \beta + \gamma)}{\sin \alpha + \sin \beta + \sin \gamma}$ શું થાય?

જો $\frac{\cos x}{a} = \frac{\cos (x + \theta)}{b} = \frac{\cos (x + 2\theta)}{c} = \frac{\cos (x + 3\theta)}{d}$ હોય,તો $\left( \frac{a + c}{b + d} \right)$ ની કિંમત શું થાય :-

$(\sec 2A + 1){\sec ^2}A = $

જો $\tan (A-B) = \frac{7}{24}$ અને $\tan A = \frac{4}{3}$ હોય,જ્યાં $A$ અને $B$ લઘુકોણ છે,તો $A+B = $

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