If y = p sin3x + q cos 3x then which of the relation is true for the function
1
\(\rm {d^2y\over dx^2} +3y=0\)
2
\(\rm {d^2y\over dx^2} -3y=0\)
3
\(\rm {d^2y\over dx^2} +9y=0\)
4
\(\rm {d^2y\over dx^2} -9y=0\)
If y = p sin3x + q cos 3x then which of the relation is true for the function