$\sin 1^{\circ} + \sin 2^{\circ} + \ldots + \sin 359^{\circ}$ का मान किसके बराबर है?

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $180$

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यदि $f(x) = \frac{\cot x}{1 + \cot x}$ और $\alpha + \beta = \frac{5 \pi}{4}$ है,तो $f(\alpha) f(\beta)$ का मान ज्ञात कीजिए।

$\tan \frac{\pi}{5} + 2 \tan \frac{2 \pi}{5} + 4 \cot \frac{4 \pi}{5}$ का मान है

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