જો $\operatorname{cosec}^2(\alpha+\beta)-\sin^2(\beta-\alpha)+\sin^2(2\alpha-\beta)=\cos^2(\alpha-\beta)$ જ્યાં $\alpha, \beta \in (0, \frac{\pi}{2})$ હોય,તો $\sin(\alpha-\beta)$ ની કિંમત શોધો.

  • A
    $-\frac{1}{2}$
  • B
    $\frac{1}{2}$
  • C
    $-\frac{\sqrt{3}}{2}$
  • D
    $\frac{\sqrt{3}}{2}$

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જો $a \sin^2 x + b \cos^2 x = c$,$b \sin^2 y + a \cos^2 y = d$ અને $a \tan x = b \tan y$ હોય,તો $\frac{a^2}{b^2}$ ની કિંમત શોધો.

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જો $\sin \theta = \frac{2t}{1+t^2}$ અને $\theta$ બીજા ચરણમાં હોય, તો $\cos \theta$ ની કિંમત શું થાય?

$\sin \frac{\pi}{16} \sin \frac{3\pi}{16} \sin \frac{5\pi}{16} \sin \frac{7\pi}{16}$ નું મૂલ્ય શું છે?

જો $\sin (y+z-x), \sin (z+x-y)$ અને $\sin (x+y-z)$ એ સમાંતર શ્રેણી ($A$.$P$.) માં હોય,તો

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