Find the derivative of f(x)=3 xsin(8 x)?

3 ⤊

2007-12-16 17:13:09 · 3 answers · asked by MareK D 1 in Science & Mathematics ➔ Mathematics

f (x) = ( 3 x ) sin 8 x
f `(x) = 3 sin 8 x + 8 ( cos 8 x ) ( 3x )
f `(x) = 3 (sin 8x + 8x (cos 8x) )

2007-12-16 22:05:12 · answer #1 · answered by Como 7 · 3⤊ 1⤋

f(x) = 3xsin 8x
f'(x) = 3sin 8x + 24xcos 8x

2007-12-16 17:21:25 · answer #2 · answered by Blake 3 · 0⤊ 1⤋

3(sin(8x))+(8cos(8x)(3x)

2007-12-16 17:15:53 · answer #3 · answered by Anonymous · 0⤊ 1⤋