Physics, asked by abhilashagavade, 5 hours ago

If a and b bar are two vectors such tho |a|= 4, b=1/2 and a.b = -1. -

find the angle between a and b

Answers

Answered by arifgilleisha

1

Answer:

120°

Explanation:

Cos angle = a.b / |a| |b|

= - 1 / [4 ÷ (1÷2)]

= - 1/ 2

Angle = cos ^ - 1 (-1/2) = 120°

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