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$\frac{\cot x - \tan x}{\cot 2x}$ का मान क्या है?

मान ज्ञात कीजिए: $\cos^2 A(3 - 4\cos^2 A)^2 + \sin^2 A(3 - 4\sin^2 A)^2$

यदि $x + \frac{1}{x} = 2 \cos \theta$ है,तो $x^3 + \frac{1}{x^3} = $

यदि $\alpha = \frac{180^{\circ}}{7}$ है, तो $3 \sin \alpha - 4 \sin^{3} \alpha$ का मान क्या होगा?

$\cos (\frac{\pi}{5})$ का मान है ...

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