103 TRIGONOMETRY PROBLEMS
From the Training of the USA IMO Team
Titu Andreescu
Zuming Feng
CONTENTS
1 Trigonometric Fundamentals 1
Definitions of Trigonometric Functions in Terms of Right Triangles 1
Think Within the Box 4
You’ve Got the Right Angle 6
Think Along the Unit Circle 10
Graphs of Trigonometric Functions 14
The Extended Law of Sines 18
Area and Ptolemy’s Theorem 19
Existence, Uniqueness, and
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