I decided to add another 3, so its 6 problems

2. Originally Posted by difx0
I decided to add another 3, so its 6 problems

$\frac{d}{d\theta} \sin{u} = \cos{u} \cdot \frac{du}{d\theta}$
$\frac{d}{d\theta} \cos{u} = -\sin{u} \cdot \frac{du}{d\theta}$
$\frac{d}{dt} ke^u = ke^u \cdot \frac{du}{dt}$