$1 + \cos 56^\circ + \cos 58^\circ - \cos 66^\circ = $

  • A
    $2 \cos 28^\circ \cos 29^\circ \cos 33^\circ $
  • B
    $4 \cos 28^\circ \cos 29^\circ \cos 33^\circ $
  • C
    $4 \cos 28^\circ \cos 29^\circ \sin 33^\circ $
  • D
    $2 \cos 28^\circ \cos 29^\circ \sin 33^\circ $

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Similar Questions

यदि $\sec \theta + \tan \theta = p$ है,तो $\tan \theta$ का मान क्या होगा?

यदि $\cos \alpha + \cos \beta = a$ और $\sin \alpha + \sin \beta = b$ है,तो List-$A$ में दी गई वस्तुओं का मिलान List-$B$ में उनके मानों से कीजिए।
List-$A$List-$B$
$(I)$ $\tan \left(\frac{\alpha + \beta}{2}\right) =$$(a)$ $\frac{b}{a}$
$(II)$ $\cos (\alpha + \beta) =$$(b)$ $\frac{2ab}{a^2 + b^2}$
$(III)$ $\sin (\alpha + \beta) =$$(c)$ $\frac{2ab}{a^2 - b^2}$
$(IV)$ $\tan (\alpha + \beta) =$$(d)$ $\frac{a^2 - b^2}{a^2 + b^2}$

यदि $\tan \theta = \frac{x \sin \phi}{1 - x \cos \phi}$ और $\tan \phi = \frac{y \sin \theta}{1 - y \cos \theta}$ है,तो $\frac{x}{y} = $

Difficult
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$(\sec A + \tan A - 1)(\sec A - \tan A + 1) - 2\tan A = $

यदि $\sin x+\sin ^2 x=1$,जहाँ $x \in\left(0, \frac{\pi}{2}\right)$,तो $(\cos ^{12} x+\tan ^{12} x)+3(\cos ^{10} x+\tan ^{10} x+\cos ^8 x+\tan ^8 x)+(\cos ^6 x+\tan ^6 x)$ का मान ज्ञात कीजिए।

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