$\sin 10^\circ + \sin 20^\circ + \sin 30^\circ + \dots + \sin 360^\circ$ નું મૂલ્ય શું છે?

  • A
    $1$
  • B
    $0$
  • C
    $-1$
  • D
    આમાંથી કોઈ નહીં

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જો $\frac{\cos x}{a} = \frac{\cos (x + \theta)}{b} = \frac{\cos (x + 2\theta)}{c} = \frac{\cos (x + 3\theta)}{d}$ હોય,તો $\left( \frac{a + c}{b + d} \right)$ ની કિંમત શોધો:

ધારો કે $S = \{ \theta \in [0, 4\pi] : \tan^2 \theta \neq 1 \}$ અને $S = \{ a \in \mathbb{Z} : 2(\cos^8 \theta - \sin^8 \theta) \sec 2\theta = a^2, \theta \in S \}$ છે. તો $n(S)$ કેટલા થાય?

$0 < x \leq \pi$ માટે,$\sinh ^{-1}(\cot x)$ ની કિંમત શું થાય?

સાબિત કરો કે: $(\sin 3x + \sin x) \sin x + (\cos 3x - \cos x) \cos x = 0$

${\left( \frac{\cos A + \cos B}{\sin A - \sin B} \right)^n} + {\left( \frac{\sin A + \sin B}{\cos A - \cos B} \right)^n}$ ($n$ એ પૂર્ણાંક છે) $=$

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