2-M

Basic Trigonometry

• sine, cosine, and tangent
• what you don’t need to know
• exercises
• answers explained

This section is very short, because it does not review all the trigonometry you learned in school. It reviews only the trigonometry you need for the Math 1 test—which is not very much. The ONLY trigonometry you need to know for the Math 1 test are the meanings of the trigonometric ratios—sine, cosine, and tangent—and one simple identity.