Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 9, 
= 15, ? = 66°
Find the angle between v + w and w
A. 42.2°
B. 36.0°
C. 23.8°
D. 78.2°
Answer: C
Mathematics
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