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This course covers topics including trigonometric functions (with graphs and inverse functions), identities and equations, solutions of triangles, complex numbers and more.

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Chapter 4, Problem 5.12

Find the exact value of each expression. (Do not use a calculator.)
cos 105° (Hint: 105° = 60° + 45°)

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Chapter 4, Problem 5.12

Find the exact value of each expression. (Do not use a calculator.)cos 105° (Hint: 105° = 60° + 45°)

Find the exact value of each expression. (Do not use a calculator.)
cos 105° (Hint: 105° = 60° + 45°)