Chapter 13 More Trigonometry

# 13.3 Graph of the cosine function

In a right-triangle, cosine is defined as the ratio of the length of the adjacent side to that of the longest side (hypotenuse). In this section, we learn about trigonometry, graph of sine function.

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In a right-triangle, cosine is defined as the ratio of the length of the adjacent side to that of the longest side (hypotenuse). In this section, we learn about trigonometry, graph of sine function.

Understanding how to find the cosine for any angle.

Knowing the graph of the cosine function and use it to solve equations.

Graph of the cosine function - Trigonometry, graph of cosine function.