જો $\sec \theta + \tan \theta = \frac{1}{3}$ હોય,તો $2 \theta$ કયા ચરણમાં આવે છે?

  • A
    $1^{st}$ ચરણ
  • B
    $2^{nd}$ ચરણ
  • C
    $3^{rd}$ ચરણ
  • D
    $4^{th}$ ચરણ

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$16 \sin(20^{\circ}) \sin(40^{\circ}) \sin(80^{\circ})$ ની કિંમત શોધો.

$\cos \frac{\pi}{7} - \cos \frac{2\pi}{7} + \cos \frac{3\pi}{7} - \cos \frac{4\pi}{7} + \cos \frac{5\pi}{7} - \cos \frac{6\pi}{7} = $

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

જો $x$ અને $y$ લઘુકોણ હોય કે જેથી $\cos x + \cos y = \frac{3}{2}$ અને $\sin x + \sin y = \frac{3}{4}$ થાય,તો $\sin(x + y)$ ની કિંમત શોધો.

$\sin ^2 5^{\circ}+\sin ^2 10^{\circ}+\sin ^2 15^{\circ}+\ldots+\sin ^2 90^{\circ}$ ની કિંમત શોધો.

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