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: