# Math Help - Differentiate expression

1. ## Differentiate expression

Hi all,

I need to differentiate this expression twice to find a new expression when t = 0.6

y = 3sin (5 pi t)

t = 0.6

(pi = 3.14)

Any help appreciated.

2. Originally Posted by astrostar
Hi all,

I need to differentiate this expression twice to find a new expression when t = 0.6

y = 3sin (5 pi t)

t = 0.6

(pi = 3.14)

Any help appreciated.
$\frac{dy}{dx} = 15\pi \cos{(5\pi t)}$

$\frac{d^2y}{dx^2}$ = $-75\pi ^2 \sin{(5\pi t)}$