$(\sin 80^{\circ} + \cos 10^{\circ})(\sin 80^{\circ} - \cos 10^{\circ}) = \ldots \ldots \ldots$

  • A
    $1$
  • B
    $2$
  • C
    $0$
  • D
    $\cos^{2} 10^{\circ}$

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Similar Questions

$\Delta ABC$ में,$\angle B$ एक समकोण है। यदि $AC = 20$ और $BC = 10$ है,तो $m\angle ACB = \ldots$ ($^{\circ}$ में)

$\frac{1-\tan ^{2} 45^{\circ}}{1+\tan ^{2} 45^{\circ}}=$

यदि $\sin ( A - B ) = \frac{1}{2}$,$\cos ( A + B ) = \frac{1}{2}$,$0^{\circ} < A + B \leq 90^{\circ}$ और $A > B$ है,तो $A$ और $B$ ज्ञात कीजिए।

सिद्ध कीजिए कि,
$(\sqrt{3}+ 1) (3-\cot 30^{\circ})=\tan ^{3} 60^{\circ}-2 \sin 60^{\circ}$

$\sin 60^{\circ} \sin 45^{\circ} + \cos 60^{\circ} \cos 45^{\circ} = \ldots \ldots \ldots \ldots$

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