Two vectors lie with their tails at the same point. When the angle between them is increased by 20 the magnitude of their vector product doubles. The original angle between them was about:
A) 0
B) 18
C) 25
D) 45
E) 90

Question

Two vectors lie with their tails at the same point. When the angle between them is increased by 20   the magnitude of their vector product doubles. The original angle between them was about:
A) 0 
B) 18 
C) 25 
D) 45 
E) 90

Quizplus · Accepted Answer

The Answer of Two vectors lie with their tails at the same point. When the angle between them is increased by 20   the magnitude of their vector product doubles. The original angle between them was about:
A) 0 
B) 18 
C) 25 
D) 45 
E) 90

Two Vectors Lie with Their Tails at the Same Point