Answer to Question #218256 in Differential Equations for Syed Hassan abdull

Question

If F(-a^2)=0, then prove that:


i. (1/F(D^2))sinax=x(1/d/dD[F(D^2)])sinax

ii.

(1/F(D^2))cosax=x(1/d/dD[F(D^2)])cosax