**5-1 Study Guide and Intervention - MRS. FRUGE**

5-1 Study Guide and Intervention Trigonometric Identities Basic Trigonometric Identities An equation is an identity if the left side is equal to the right side for all values of the variable for which both sides are defined. Trigonometric identities are identities that involve trigonometric functions. Reciprocal Identities Pythagorean Identities sin θ = 1 csc θ csc θ = 1 sin 𝜃 cos θ = 1 ...

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