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Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

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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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Ch. R - Algebra Review

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Ch. 8 - Complex Numbers, Polar Equations, and Parametric Equations

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Chapter 4, Problem 5.18

Find the exact value of each expression. (Do not use a calculator.)
cos (7π/9) cos (2π/9) - sin (7π/9) sin (2π/9)

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Chapter 4, Problem 5.18

Find the exact value of each expression. (Do not use a calculator.)cos (7π/9) cos (2π/9) - sin (7π/9) sin (2π/9)

Find the exact value of each expression. (Do not use a calculator.)
cos (7π/9) cos (2π/9) - sin (7π/9) sin (2π/9)