$\sin ^{2} 1^{\circ} + \sin ^{2} 3^{\circ} + \sin ^{2} 87^{\circ} + \sin ^{2} 89^{\circ} = \ldots$

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $4$

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Similar Questions

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

सिद्ध कीजिए कि $\frac{\cot A - \cos A}{\cot A + \cos A} = \frac{\operatorname{cosec} A - 1}{\operatorname{cosec} A + 1}$.

$\sec (90^\circ - \theta) = \dots$

$\tan (65^\circ - \theta) - \cot (25^\circ + \theta) - \sec (55^\circ - \theta) + \operatorname{cosec}(35^\circ + \theta) = \ldots \ldots \ldots \ldots$ (जहाँ,$0 < \theta < 25^\circ$)

निम्नलिखित सर्वसमिका को सिद्ध कीजिए,जहाँ कोण न्यून कोण हैं जिनके लिए व्यंजक परिभाषित हैं:
$(\sin A + \operatorname{cosec} A)^2 + (\cos A + \sec A)^2 = 7 + \tan^2 A + \cot^2 A$

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