Question

The angle between two vectors a and b with magnitudes 2 and 1 unit respectively and a.b= root 3

OPTION A - 30°
OPTION B - 60°
OPTION C - 45°
OPTION D - 90°


please give the correct explanation​

Answer 1

Answer:

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Answer 2

Answer:

1. a.b= abcos theta
2. root3=2×1cos theta
3. root3=2 cos theta
4. if 2 came in L.H.S It becomes division
5. root3/2= cos theta
6. cos 30=root3/2
7. theta=30