$\cos (40^{\circ}-\theta)-\sin (50^{\circ}+\theta) = \ldots \ldots \ldots \ldots$

  • A
    $\sin 40^{\circ}$
  • B
    $\sin 10^{\circ}$
  • C
    $2$
  • D
    $0$

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$\angle A$ के सभी अन्य त्रिकोणमितीय अनुपातों को $\sec A$ के पदों में लिखिए।

$\tan \theta + \cot \theta = \ldots \ldots \ldots$

$(\sin \theta+\cos \theta)^{2}+(\sin \theta-\cos \theta)^{2} = \dots$

यदि $\sin ^{2} 35^{\circ} + \cos ^{2} \theta = 1$ है,तो $\theta = \ldots \ldots \ldots \ldots$ ($^{\circ}$ में)

यदि $a \sin \theta + b \cos \theta = c$ है,तो सिद्ध कीजिए कि $a \cos \theta - b \sin \theta = \pm \sqrt{a^2 + b^2 - c^2}$,जहाँ $a^2 + b^2 \geq c^2$ दिया गया है।

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