Here in question
The order is the highest numbered derivative in the equation with no negative or fractional power of the dependent variable and its derivatives, while the degree is the highest power to which a derivative is raised.
Concept of the question
So, in this question, the x of sin(x) is replaced by y which means that the power of y is not defined as it approaches infinity by the above formula
So, the order of the above differential equation 2 and the degree of the differential equation is 2.
In a differential equation, when the dependent variable and their derivatives are only multiplied by constants or independent variable, then the equation is linear.
So, in this question the dependent variable is y, and the term y is multiplied by itself, so the given equation is non-linear.
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