If vector A and B are two non collinear unit vectors and if |A+B|=, then find the value of (A-B).(2A+B)
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Explanation:
Here, and are two non collinear unit vectors.
and ......................................................(i)
Squaring both sides of above equation (i),
→
→ 1 + 1 + 2 .1.1. = 3 [∵ the magnitude of unit vector is equal to 1]
→ = 1/2
Now,
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