Multiple angle formulas are trigonometric identities that express the trigonometric functions of multiples of an angle in terms of the functions of the angle itself. These formulas are particularly useful for simplifying expressions and solving equations involving sine, cosine, and tangent functions when dealing with angles such as 2θ, 3θ, or higher multiples. Understanding these formulas allows for easier manipulation of trigonometric expressions and provides a deeper insight into periodic functions.
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