y=8x³+9sin(x)
y'=24x²+9cos(x)
y=x²/c×sin(x)
y'=[2cx×sin(x)-cx²cos(x)]/c²×sin²(x)=
[2x×sin(x)-x²cos(x)]/c×sin²(x)
y=8x³+9sin(x)
y'=24x²+9cos(x)
y=x²/c×sin(x)
y'=[2cx×sin(x)-cx²cos(x)]/c²×sin²(x)=
[2x×sin(x)-x²cos(x)]/c×sin²(x)