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OpenStax, Algebra and Trigonometry 2e §9.5 Solving Trigonometric Equations · Example 10 · Trigonometry · Identities

Solving a Trigonometric Equation in Quadratic Form

Solve the equation exactly: $co s^{2} θ + 3 cos θ - 1 = 0, 0 \leq θ < 2 π .$

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OpenStax, Algebra and Trigonometry 2e · §9.5 Solving Trigonometric Equations · Example 10

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