1.

The angle between two vectors a = 5i+5j and b = 5i-5j will be

Answer» Given vector

a=5i+5j

b=5i-5j

Angle between two vectors

Cos(theta)=a.b/|a||b|

Cos(theta)=(5i+5j).(5i-5j)/[√(5^2+5^2).√(5^2+5^2)]

Cos(theta)=(25-25)/(√50.√50 )

Cos(theta)=0

Theta =π/2


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