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Two unit vectors are inclined at an angle, so that their resultant is also a unit vector. the angle is -

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RPSC 2nd Grade Science - 2015 Official Paper
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  1. 30°
  2. 60°
  3. 120°
  4. 150°

Answer (Detailed Solution Below)

Option 3 : 120°
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Detailed Solution

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Concept:

For two vectors  and , the resultant will be:

Calculation:

Given:

cos θ = -1/2

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