Solving trigonometric equations using doubleangle identities  Trigonometric Equations
Solving trigonometric equations using doubleangle identities
Basic Concepts
 Reference angle
 Find the exact value of trigonometric ratios
 ASTC rule in trigonometry (All Students Take Calculus)
 Doubleangle identities
Related Concepts
 Derivative of trigonometric functions
Lessons

1.
Utilizing "DoubleAngle Identities" to solve: