- Thread starter
- #1

**Partial Derivatives**

Hi all I was wondering if anyone could help me with this problem. I have a triangle that has a = 13.5m, b = 24.6m c, and theta = 105.6 degrees.

Can someone remind me of what the cosine rule is?

Also (my question is here)

From the cosine rule i need to find:

- the partial derivative of c with respect to a?
- the partial derivative of c with respect to b?
- the partial derivative of c with respect to theta?

How would i go about finding these partial derivatives for these? Do I need to know what the cosine rule is and what the value of c is?

How to find the partial derivatives?

Any help will be appreciated.

Last edited by a moderator: