# Homework Help: I can't work out how to use my calculator pleae help exam sunday

Tags:
1. Aug 26, 2011

### Pete789

1. I have two calculators. including the Texas inspire cx. I can't make either of them work reliably on trig questions. I have an exam sunday and i need to be sure how to use my inspire.

2. Summation: [50][0.5] + [50][0.07cos35] + [100][0.1cos35] = 13.55

3. Now i got this formula off my uni text book. However, i consistently get the wrong answer. The internet and the book that came with my inspire are useless.

Pete

Last edited: Aug 26, 2011
2. Aug 26, 2011

### SteamKing

Staff Emeritus
If you are using degrees in your trig formulas, make sure the calculator is set to degrees rather than radians.

3. Aug 27, 2011

### Pete789

Yep right, got it thanks Steamking. Now it works

Peter