- #1

- 8

- 0

## Homework Statement

F(x,y)= sin(x)sin(y)sin(x+y) over the square 0< x< pi and 0< y< pi

(The values for x and y should be from 0 to pi

**INCLUSIVE)**

## Homework Equations

## The Attempt at a Solution

partial derivative in terms of x = siny[cosxsin(x+y)+sinxcos(x+y)]

you get y=0, pi because siny =0, but I don't know how to solve for the other solutions

partial derivative in terms of y = sinx[cosysin(x+y)+ sinycos(x+y)]

and you get x=0, pi because sinx=0

and then I have the same problem again