$\cos 1^\circ + \cos 2^\circ + \cos 3^\circ + \dots + \cos 180^\circ = $

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $2$

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જો $\sec \theta = x + \frac{1}{4x}$ જ્યાં $0^{\circ} < \theta < 90^{\circ}$ હોય,તો $\sec \theta + \tan \theta$ ની કિંમત શોધો:

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જો $7 \sin a = 24 \cos a$ હોય,તો $14 \tan a - 75 \cos a - 7 \sec a$ ની કિંમત શોધો:

$\cos^2 48^\circ - \sin^2 12^\circ = $

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જો $\tan 3^{\circ} + 2\tan 6^{\circ} + 4\tan 12^{\circ} + 8\cot 24^{\circ} = \cot \theta^{\circ}$ હોય,તો:

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