In Exercises 1-4, find the exact value of each expression. 1. a. cos ( / 4 +
Question:
1.
a. cos (π / 4 + π / 3)
b. cos π / 4 + cos π / 3
2.
a. sin(7π / 6 - π / 3)
b. sin 7π / 6 - sin π / 3
3.
a. sin(135° − 30°)
b. sin 135° − cos 30°
10.
a. cos(120° + 45°)
b. cos 120° + cos 45°
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