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 $\cos (\theta+\phi)=\frac{3}{5}$ અને $\sin (\theta-\phi)=\frac{5}{13}$,જ્યાં $0 < \theta, \phi < \frac{\pi}{4}$,તો $\cot (2 \theta)$ ની કિંમત શોધો:

$\cos ^4 \frac{\pi}{24} - \sin ^4 \frac{\pi}{24} = $

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

જો $m \tan (\theta - 30^\circ) = n \tan (\theta + 120^\circ)$ હોય,તો $\frac{m + n}{m - n} = $

$1 + \cos 2x + \cos 4x + \cos 6x = $

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