# Math Help - Differential Equation and conditions

1. ## Differential Equation and conditions

1 ) Solve this Differential Equation :

2 ) Find : and
3 ) Solve in R :

2. Originally Posted by dhiab
1 ) Solve this Differential Equation :

2 ) Find : and
3 ) Solve in R :
1) Read this: Linear Homogeneous Ordinary Differential Equations with Constant Coefficients

2) Perhaps try the model $f(x) = a \cos (x) + b \sin (x)$ and solve for a and b. Is the function in 3) meant to be the same as the function in 2)?