## Trigonometry

Summary

This content provides a comprehensive overview of trigonometry essentials, focusing on the SOHCAHTOA mnemonic for understanding sine, cosine, and tangent ratios in right triangles, and the specific ratios for 45-45-90 and 30-60-90 triangles, crucial for GRE exam preparation.

- Introduction to the basics of trigonometry, emphasizing the importance of understanding the SOHCAHTOA mnemonic for sine, cosine, and tangent ratios.
- Detailed exploration of the special right triangles (45-45-90 and 30-60-90), including how to deduce their sine, cosine, and tangent ratios without a calculator.
- Explanation of the significance of these trigonometric ratios in solving GRE exam problems, especially given the absence of a calculator.
- Presentation of handy decimal approximations for square roots of 2 and 3 to aid in quick calculations.
- A practice problem to apply the learned trigonometric ratios and approximations, demonstrating their practical utility in exam scenarios.

Chapters

00:00

Introduction to Trigonometry

00:56

Understanding SOHCAHTOA

02:47

Special Right Triangles

09:09

Practical Applications and Approximations