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AP EAMCET2003MathematicsVector Algebra

If a , b , c are three vectors such that a = b + c and the angle between b and c is 2 , then:

Options

  1. Aa^2=b^2+c^2
  2. Bb^2=c^2+a^2
  3. Cc^2=a^2+b^2
  4. D2 a^2-b^2=c^2

Correct answer

A. a^2=b^2+c^2

Step-by-step solution

Given that a = b + c and b c then ( a )^2=( b )^2+( c )^2a^2=b^2+c^2

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