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In this lesson, we will review core concepts in trigonometry. We will first discuss the right triangle and the sin, cos, and tangent ratios. Next, we will discuss how these trig identities can be used to solve problems in math, physics, and engineering.

Finally, we will learn how to use the trig ratios to decompose a vector into x and y components in order to solve problems. Trigonometry is a core skill for all students in math, science, and engineering and is used extensively in calculus.