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यदि $A + B + C = \pi$ है,तो $\cos \, 2A + \cos \, 2B + \cos \, 2C = $

यदि $A$ और $B$ पूरक कोण हैं,तो:

व्यंजक $E = \sin \theta + \cos \theta + \sin 2\theta$ का अधिकतम मान क्या है?

$\cos^2 \left( \frac{\pi}{3} - x \right) - \cos^2 \left( \frac{\pi}{3} + x \right)$ का अधिकतम मान है

यदि $a^{2} > b^{2}$ है,तो $f(x) = a^{2} \cos^{2} x + b^{2} \sin^{2} x$ का न्यूनतम मान ज्ञात कीजिए।

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