1.

The graph of the function y = f(x) passing through the point (0, 1) and satisfying the differential equation `(dy)/(dx) + y cos x = cos x` is such thatA. It is constant functionB. It is periodicC. it is neither an even nor an odd function.D. it is continuous and differentiable for all x

Answer» Correct Answer - A::B::D
`(dy)/(dx)+ycosx=cosx` (linear)
I.F. =`e^(intcosxdx)=e^(sinx)`
Thus, solution is `ye^(sinx)=inte^(sinx)cosxdx=e^(sinx)+c`
When `x=0, y=1`, then c=0
Thus, y=1. Hence, option (1), (2), (4) are true.


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