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If hatl and hatm are unit vectors and th...

If `hatl and hatm` are unit vectors and `theta` is the angle between then `theta` is given by

A

`costheta = abs(hatl - hatm)`

B

`sin"" theta/2 = 1/2abs(hatl-hatm)`

C

`cos"" theta/2 = 1/2abs(hatl - hatm)`

D

`tan"" thata/2 = 1/2 abs(hatl-hatm)//abs(hatl-hatm)`

Text Solution

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The correct Answer is:
B
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