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Let y(x) be the solution of the differen...

Let `y(x)` be the solution of the differential equation `(dy)/(dx)+(3y)/(cos^2x)=1/(cos^2x) ` and `y(pi/4)=4/3` then vaue of `y(-pi/4)` is equal to (a) `-4/3` (b) `1/3` (c) `e^6+1/3` (d) `3`

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