જો $\frac{x}{\cos \theta} = \frac{y}{\cos \left( \theta - \frac{2\pi}{3} \right)} = \frac{z}{\cos \left( \theta + \frac{2\pi}{3} \right)},$ હોય,તો $x + y + z = $

  • A
    $1$
  • B
    $0$
  • C
    $-1$
  • D
    આપેલ પૈકી કોઈ નહીં

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$\sin {163^\circ} \cos {347^\circ} + \sin {73^\circ} \sin {167^\circ} = $

$\cos 15^{\circ} - \sin 15^{\circ}$ ની કિંમત ...... છે.

જો $\tan A = -\frac{1}{2}$ અને $\tan B = -\frac{1}{3}$ હોય,તો $A + B = $

જો $\alpha$ એ $3^{\text{rd}}$ ચરણમાં હોય,$\beta$ એ $2^{\text{nd}}$ ચરણમાં હોય અને $\tan \alpha = \frac{1}{7}$ તથા $\sin \beta = \frac{1}{\sqrt{10}}$ હોય,તો $\sin(2\alpha + \beta)$ ની કિંમત શોધો.

જો $\tan \left( \frac{\pi }{4} + \theta \right) + \tan \left( \frac{\pi }{4} - \theta \right) = \lambda \sec 2\theta$ હોય,તો $\lambda$ =

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