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ધારો કે $f(x) = \cos 5x + A \cos 4x + B \cos 3x + C \cos 2x + D \cos x + E$,અને $T = f(0) - f\left(\frac{\pi}{5}\right) + f\left(\frac{2\pi}{5}\right) - f\left(\frac{3\pi}{5}\right) + \dots + f\left(\frac{8\pi}{5}\right) - f\left(\frac{9\pi}{5}\right)$. તો,$T$

જો $A+B+C=\frac{\pi}{4}$ હોય,તો $\sin 4A+\sin 4B+\sin 4C=$

$2^{\sin \theta} + 2^{\cos \theta}$ એ કોના કરતા મોટા છે?

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વિધેય $|\sin 4x + 3|$ ની મહત્તમ અને ન્યૂનતમ કિંમતો શોધો.

$k$ ના કેટલા પૂર્ણાંક મૂલ્યો માટે સમીકરણ $7 \cos x + 5 \sin x = 2k + 1$ નો ઉકેલ મળે?

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