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Logo for Trigonometry
According to The Orange Grove, "This book covers elementary trigonometry. It is suitable for a one-semester course at the college level, though it could also be used in high schools. The prerequisites are high school algebra and geometry. Contents: 1) Right Triangle Trigonometry. 2) General Triangles. 3) Identities. 4) Radian Measure. 5) Graphing and Inverse Functions. 6) Additional Topics. Appendix A) Answers and Hints to Selected Exercises. Appendix B) Graphing with Gnuplot."
Material Type: Open Textbook
Technical Format: PDF
Date Added to MERLOT: January 06, 2011
Date Modified in MERLOT: November 05, 2013
Submitter: Cathy Swift


  • Reviewed by members of Editorial board for inclusion in MERLOT.
    Editor Review
    Very good quality; in queue to be peer reviewed
    avg: 5 rating
  • User review 4 average rating
  • User Rating: 4 user rating
  • Discussion (2 Comments)
  • Learning Exercises (none)
  • Personal Collections (1)
  • Accessibility Info (none)


Primary Audience: High School, College General Ed, College Lower Division
Mobile Compatibility: Not specified at this time
Language: English
Cost Involved: no
Source Code Available: unsure
Accessiblity Information Available: unsure
Creative Commons: Creative Commons License
This work is licensed under a Attribution-NonCommercial-NoDerivs 3.0 United States


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Discussion for Trigonometry

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Avatar for John Redden
51 weeks ago

John Redden (Faculty)

This textbook is very much usable for any beginning Trigonmetry course. I had to supplement the exercise set a bit in a number of sections. Also, I was able to supplement with topics found in the Stitz and Zeager Trigonometry textbook:  Also, students found the videos found here to be useful:

Time spent reviewing site: 10 hours
Used in course

Avatar for John Redden
51 weeks ago

John Redden (Faculty)

Here is the website dedicated to this textbook:
Used in course