Good book recommendations on trigonometry

Question

I need to find a good book on trigonometry, I was using trigonometry demystified but I got sad when I read this line:

Now that you know how the circular functions are defined, you might wonder how the values are calculated. The answer: with an electronic calculator!

I know a book which seems to be really good: Loney's Plane Trigonometry, I'm just not sure if the book is up to date.

Answer 1

You might want to look at the following book references:

• Trigonometry, I.M. Gelfand, Mark Saul

• Trigonometry Refresher (Dover Books on Mathematics), A. Albert Klaf, Mathematics

• Schaum's Outline of Trigonometry, 5th Edition, Robert Moyer, Frank Ayres

• Trigonometry, 8th Edition, Ron Larson ($$$)

• Advanced Trigonometry, by C.V. Durell, A. Robson

You might also want to review online items. For example:

• Khan Academy

• Trig WikiBooks

• Open Course Ware on Trigonometry

Enjoy!

Answer 2

Plane Trigonometry by S.L. Loney is the best book for trigonometry.The concepts are explained in a very good manner in the book.

Answer 3

Are you only interested in a Book, can I suggest a material that has lecture notes? A video? :) It has been an excellent learning material for many I know of.

ThinkWell Trignometry

As for a book, try this out as well:

• Plane and Spherical Trigonometry