## 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