Ok. I am going to make a feeble attempt at asking this question without the use of the a symbolic editor. Its gonna be a mess so strap yourself in for the ride.

I am in my final math class for my EE (Advanced Eng. Mathematics) and we have just begun with a “refresher” on coord system transformations. I have gotten every thing fine up until this question on the practice problems (please assume that every capital letter is a unit vector):

Transform the following vectors into spherical coordinates and then evaluate them at the indicated points:

A= Xy^2 + Yxz + Z4: In cartesian the points are (1, -1, 2)

Now I have the book which gives the 3 equations which you solve to get the 3 spherical coordinates: R, theta, and phi. They are too long for me to input into this post, but I am thinking that anyone who would be able to help will already know them or have access to them. The thing is that they are packed with sin and cos functions. I punch all three equations into my TI-89 (best calc ever made) and the thing comes back with some crazy answers that I cant even understand. I am very comfortable with this calc (I’ve used for three years straight) so I know I am punching it in correctly.

The answers are right next to the problem so we can check ourselves.

A=R2.858 -THETA2.887+PHI2.121

I am not even getting numbers for my answer on my calc, just a copy of the same equations.

This is NOT a graded assignment nor is it a quiz or anything like that. We are going to be going over it in class on Wendsday so please don’t get all mad at me for making you do my homework. This is an optional refresher. We have the answer for petes sakeI just want to get it together before class on Wendsday so I can follow along with his instruction. I just want a good starting point. I think I may be making this harder than it is.

Are there any weblinks that cover this type of problem in laymans terms? Does anyone have any tips or a good place to start?