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.

  • A
    $\frac{3 \times \sqrt{10}}{25}$
  • B
    $\frac{3}{\sqrt{10}}$
  • C
    $\frac{3}{25 \sqrt{10}}$
  • D
    $\frac{\sqrt{10}}{3 \times 25}$

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