Solution of the equation \cos ^2 x \frac{d y}{d x}-(\tan 2 x) y=\cos ^4 x, x| < \frac{\pi}{4}, where y (\frac{\pi}{6}) = {3 \sqrt{3}}/{8}, is given by

y \frac{\tan 2 x}{1-\tan ^2 x}=0

y=\frac{1}{2} \cdot \frac{ \sin 2 x}{1-\tan ^2 x}

CGPET 2014 Solved Paper

Section: Mathematics

Question : 138 of 150

Marks: +1, -0

Solution of the equation cos2x‌

−(tan‌2‌x)y=cos4x,‌‌x|<‌

, where y(‌

)=‌

3√3

, is given by

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