જો $\frac{\sin(x + y)}{\sin(x - y)} = \frac{a + b}{a - b}$ હોય,તો $\frac{\tan x}{\tan y}$ ની કિંમત શોધો.

  • A
    $\frac{b}{a}$
  • B
    $\frac{a}{b}$
  • C
    $ab$
  • D
    આમાંથી કોઈ નહીં

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જો $\sin (A+B) \sin (A-B)+\cos (A+B) \cos (A-B)=\frac{1}{2}$ અને $0 < B < \frac{\pi}{2}$ હોય,તો $B=$

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