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OpenStax, Precalculus 2e §7.6 Modeling with Trigonometric Functions · Review Exercise 101 · Trigonometry · Identities

Modeling with Trigonometric Functions · Review Exercise 101

Graph each side of the equation to find the zeroes on the interval $[0, 2 π) .$

$20 co s^{2} x + 21 cos x + 1 = 0$

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OpenStax, Precalculus 2e · §7.6 Modeling with Trigonometric Functions · Review Exercise 101

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