## Fundamental Trig Identities

Summary
The content provides an in-depth exploration of the six trigonometric functions, emphasizing the importance of understanding their relationships and applications, particularly in the context of the GRE exam.
• Introduced cotangent, secant, and cosecant as extensions of the basic trigonometric functions sine, cosine, and tangent, highlighting their geometric origins and relationships.
• Explained the reciprocal nature of the six trigonometric functions and the significance of memorizing these relationships for problem-solving.
• Discussed the fundamental Pythagorean identity and its extensions to include all six trig functions, underscoring the value of understanding over memorization for application in calculus and GRE problems.
• Provided a practical application through a practice problem, demonstrating how to apply trigonometric identities and the Pythagorean theorem to solve for unknown variables in a triangle.
• Emphasized the necessity of a deep comprehension of these trigonometric concepts for success in the GRE and future mathematical studies.
Chapters
00:00
Introduction to Extended Trig Functions
01:35
Geometric Origins and Reciprocal Relationships
04:34
Understanding Pythagorean Identities
06:34
Application Through Practice Problems