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OpenStax, Precalculus 2e §7.6 Modeling with Trigonometric Functions · Review Exercise 67 · Trigonometry · Identities

Modeling with Trigonometric Functions · Review Exercise 67

Find the exact value.

$cos (8 3^{\circ}) cos (2 3^{\circ}) + s in (8 3^{\circ}) s in (2 3^{\circ})$

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OpenStax, Precalculus 2e · §7.6 Modeling with Trigonometric Functions · Review Exercise 67

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