## Math 25: College Trigonometry

### The Adobe Reader

To use the textbook and Optimath system in this course, you must have properly installed and configured the Adobe Reader on your computer. You will need to download a free copy of the Acrobat Reader to read them. Click the following icon to obtain a free copy of the Acrobat Reader.

It is important that you have the most current version of the Acrobat Reader that your system will allow. The above links will take you to the Adobe site. The Adobe site will analyze your system, but you may be asked to choose the appropriate version of the reader for your system. If this happens, carefully select the appropriate version of the reader for your system.

#### Installation Instructions:

- If you use a Windows PC, please follow these installation instructions for the Adobe Reader.
- If you use a Macintosh, please follow these installation instructions for the Adobe Reader.

### Course Description

At College of the Redwoods, Math 25 is the course number for our College Trigonometry course. College Trigonometry is a transfer-level math course needed for preparation for the calculus series (Math 50A-B-C). Math 30 (College Algebra) and Math 25 together constitute what is often referred to as "Precalculus". Most students take Math 30 before Math 25, but these two courses may be taken in either order or at the same time.

**Prerequisites**: Grade of C or better in Math 120 (Intermediate Algebra) or equivalent, or an appropriate score on the math placement exam.

**Course Description**: A study of trigonometric functions, radian measure, solution of right triangles, graphs of the trigonometric functions, inverse trigonometric functions, trigonometric identities and equations, laws of sines and cosines, solution of oblique triangles, polar coordinates, complex numbers in trigonometric form, De Moivreâ€™s theorem, and conic sections.

### Student Information and Help Resources>

**Textbook**: The current textbook for the course is*Algebra and Trigonometry*(7th edition), by Sullivan, published by Prentice Hall, ISBN #0131430734.

This book can be used for both Math 30 and Math 25.

A limited number of textbooks are available on loan from the library. The textbook can also be purchased very inexpensively from various online book sellers.**Recommended**:*Student Solutions Manual*for the 7th edition, ISBN #0131430793

**Alternate version of the textbook**: You can purchase the 8th edition instead (ISBN #0132329034). The 8th edition can also be purchased very inexpensively from various online book sellers.**Recommended**:*Student Solutions Manual*for the 8th edition, ISBN #0132321246

**Note**: Do**not**purchase the textbook from the CR bookstore — you will pay 10 times the price at the bookstore. Also, do**not**purchase the 9th edition. Study Guidelines will not be provided for the 9th edition.**Textbook Correlation Guides**:**Graphing Calculator**: Students are required to use a graphing calculator in the Math 25 course. Students can rent a calculator for the semester for $20. Instructions are available at the following link:**Math Lab**: Math 25L is the Math Lab course for Math 25 students.**OPTIMATH**is our locally-developed online practice and testing system. The portal for OPTIMATH is

http://msenux2.redwoods.edu/optimath

For information on how to get started, see the

Introduction to OPTIMATH.

Even if your instructor does not use OPTIMATH as a formal part of the course, your can still access the following online practice exercises: