जब $A = \frac{5\pi}{4}$ हो,तो $\cos A - \sin A$ का मान क्या होगा?

  • A
    $\sqrt{2}$
  • B
    $\frac{1}{\sqrt{2}}$
  • C
    $0$
  • D
    $1$

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$(\sin 210^{\circ})(\sin 585^{\circ})$ का मान क्या है?

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यदि $5 \tan \theta = 4$ है,तो $\frac{5 \sin \theta - 3 \cos \theta}{5 \sin \theta + 2 \cos \theta} = $

यदि $\tan \theta = - \frac{1}{\sqrt{10}}$ और $\theta$ चौथे चतुर्थांश में स्थित है,तो $\cos \theta = $

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