Form the differential equation representing the family of curves `y=A cos(x+B)` where A and B are parameters.

Explanation

We have given

`y=A cos(x+B)`

Differentiating w.r.t. `x`, we get,

`dy/dx=-Asin(x+B)`

Again, differentiating w.r.t. `x`. we get,

`frac{d^{2} y}{d x^{2}}=-A cos (x+B)`



...