Teaching DSSSB TGT Mock Test 2025 Mathematics Differential Equations Formation of a Differential Equation
y = 4cos3x is the solution of which of the following differential equations?
1
\(\frac{d^2 y}{d x^2}+9 y\) = 0
2
\(\frac{d^2 y}{d x^2}-9 y\) = 0
3
\(\frac{dy}{dx}-3 y\) = 0
4
\(\frac{dy}{dx}+3 y\) = 0