$\cos \theta = \frac{b}{\sqrt{a^2 + b^2}}$; जहाँ,$0 < \theta < 90^\circ$; तो $\sin \theta = \dots$

  • A
    $\frac{a}{\sqrt{a^2 + b^2}}$
  • B
    $\frac{a}{b}$
  • C
    $\frac{b}{a}$
  • D
    $\frac{ab}{\sqrt{a^2 + b^2}}$

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Similar Questions

$\Delta ABC$ में,$m\angle A = 90^\circ$,$AB = 5$,$AC = 12$ और $BC = 13$ है। अतः,$\sin C + \cos C = \ldots$

$\tan (90^\circ - \theta) = \ldots \ldots \ldots$

$\sin 48^{\circ} \sec 42^{\circ} + \cos 48^{\circ} \operatorname{cosec} 42^{\circ} = \ldots \ldots \ldots \ldots$

'True' (सत्य) या 'False' (असत्य) लिखिए और अपने उत्तर का औचित्य बताइए।
$(\tan \theta+2)(2 \tan \theta+1)=5 \tan \theta+\sec ^{2} \theta$

यदि $\cos 9 \alpha = \sin \alpha$ और $9 \alpha < 90^{\circ}$ है,तो $\tan 5 \alpha$ का मान ज्ञात कीजिए।

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