this is pretty easy. just wnna ask you if you know?

1 ⤊

find the first derivative of x=cos4t

2006-11-30 19:07:04 · 4 answers · asked by sheryl 1 in Science & Mathematics ➔ Mathematics

i know it of course

2006-11-30 19:19:11 · update #1

The first derivative of x with respect to t is -4*sin(4t),

dx/dt = -4sin(4t)

2006-11-30 19:11:07 · answer #1 · answered by mrjeffy321 7 · 1⤊ 0⤋

x=sin4t
It is based on the slope of the graphical representation and equation.

2006-11-30 19:11:43 · answer #2 · answered by Jared H 2 · 0⤊ 2⤋

-4 sin(4t)

(If you can ask it, you should know it!)

2006-11-30 19:10:11 · answer #3 · answered by Dr Spock 6 · 0⤊ 0⤋

x=cos4t
dx/dt=d/dt(cos4t)
dx/dt=-sin4t*(d(4t)/dt)
dx/dt=-sin4t *4
dx/dt=-4sin4t

2006-11-30 19:33:31 · answer #4 · answered by riya s 2 · 0⤊ 0⤋