Lesson

# 3.4 TRIGONOMETRIC EQUATIONS

After completing this section, you should be able to:

• solve sine equations in degrees: $\sin \theta = \displaystyle \dfrac{1}{2}$
• solve cosine equations in degrees: $\sin \theta = \displaystyle \dfrac{1}{2}$
• solve tangent equations in degrees: $\sin \theta = \displaystyle \dfrac{1}{2}$
• solve quadratic trigonometric equations in degrees: $2\sin^2 \theta -3 \sin \theta + 1 = 0$