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sum of two unit vector is also a unit vector then maganitude of their difference is

sum of two unit vector is also a  unit vector then maganitude of their difference is

Grade:11

1 Answers

Priyanshu Gujjar
101 Points
2 months ago

a+b=1

a2+∣b2+2∣a∣∣b∣cosθ=1
2(1+cosθ)=1
cosθ=21θ=120
a+b=a∣+∣b2−2∣a∣∣b∣cosθ
=1+1−2cos120
=2+2×21=3.

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