Trigonometry and the Unit Circle

The video tutorial covers the basics of trigonometry, including the study of angles and the relationships between angles and sides of triangles. It explains the three basic trigonometric functions: sine, cosine, and tangent, and introduces the mnemonic SOHCAHTOA. The tutorial also discusses reciprocal and quotient identities, the unit circle, and how trigonometric functions can be extended to negative angles and angles larger than 90 degrees. It highlights the importance of understanding the signs of functions in different quadrants using the ASTC mnemonic.

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