5:57 Sum and Difference Identities given
10:46 Example 1 Sin(5pi/12)
13:48 Example 2
16:35 Example 3
18:31 Example 4 Determine quadrant based on given ratio of sine and tangent, and evaluate sine of sum of two unknown angles
24:26 Example 5 Given inverse trig functions evaluate the sin(alpha + beta)
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