Math 25: Trigonometry
At College of the Redwoods, Math 25 is the course number for our Trigonometry course. The information on this page is designed for use by a number of constituencies:
- instructors of Trigonometry,
- students enrolled in Trigonometry, and
- all others interested in gathering information about our Trigonometry course.
Be sure to visit this page often, as there will be frequent updates to the information provided.
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. The CR Bookstore should have some used copies available, and it can also be purchased very inexpensively from various online book sellers.
This book can be used for both Math 30 and Math 25.
Recommended Ancillaries:
• Student Solutions Manual for the 7th edition, ISBN #0131430793
• Alternatively, you can purchase the Student Study Pack for the 7th edition (ISBN #0131631837), which contains both the Student Solutions Manual and the CD Lecture Series
Alternate version: If you have trouble finding the 7th edition of the textbook, then you can purchase the 8th edition instead. The 8th edition textbook combined with the Student Study Pack for the 8th edition (which contains the Student Solutions Manual) is available at the CR bookstore (ISBN #0136150667). - Textbook Correlation Guides:
- Math Lab: Math 52 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://msenux.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: