# Math Help - Chain Rule Partial Derivatives (multivariable calculus)

1. ## Chain Rule Partial Derivatives (multivariable calculus)

Use the Chain Rule to find the indicated partial derivatives.
, r = y + x cos(t), s = x + y sin(t);

when x = 2, y = 2, t = 0

2. Hello,
Originally Posted by acg716
Use the Chain Rule to find the indicated partial derivatives.
, r = y + x cos(t), s = x + y sin(t);

when x = 2, y = 2, t = 0
$\frac{\partial u}{\partial x}=\frac{\partial u}{\partial r} \cdot \frac{\partial r}{\partial x}+\frac{\partial u}{\partial s} \cdot \frac{\partial s}{\partial x}$

read this : The Multivariable Chain Rule - HMC Calculus Tutorial