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यदि $f(x) = \cos^2 x + \sec^2 x$ है,तो

यदि $p = \sin^2 \theta + \cos^4 \theta$ है,तो $\theta$ के सभी वास्तविक मानों के लिए निम्नलिखित में से कौन सा सत्य है?

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यदि $A, B, C$ एक त्रिभुज के कोण हैं,तो $\sin 2A - \sin 2B + \sin 2C =$

$f(x) = \sin x + \cos 2x$ का अधिकतम मान क्या है?

Difficult
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मान लीजिए $f(x) = \cos 5x + A \cos 4x + B \cos 3x + C \cos 2x + D \cos x + E$,और $T = f(0) - f\left(\frac{\pi}{5}\right) + f\left(\frac{2\pi}{5}\right) - f\left(\frac{3\pi}{5}\right) + \dots + f\left(\frac{8\pi}{5}\right) - f\left(\frac{9\pi}{5}\right)$. तो,$T$

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