Clearly u = cos x and v = sin x are solutions of y'' + y = 0. Show that and z = uv are solutions of z''' + 4z' = 0
I dont understand how to start this off. Im not asking for the answer just trying to understand what is going on or what to do.
Clearly u = cos x and v = sin x are solutions of y'' + y = 0. Show that and z = uv are solutions of z''' + 4z' = 0
I dont understand how to start this off. Im not asking for the answer just trying to understand what is going on or what to do.
Is what's meant to be clear, clear? Just in case a picture helps...
... differentiating downwards.
Spoiler:
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Don't integrate - balloontegrate!
Balloon Calculus; standard integrals, derivatives and methods
Balloon Calculus Drawing with LaTeX and Asymptote!