If A, B = 1/2 AB then angle between A and B is
Correct answer: C. 60
- A. Zero
- B. 30
- C. 60
- D. 90
Explanation
In this case dot product is equal to scalar product of two vector A.B= A x B x cos θ In this case on right hand side of equation, ½ will be Hence θ will be 60. Option A, B and D give wrong value of angle
This question appeared on the ETEA MDCAT 2019 paper, which you can sit online with every answer explained.
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About Scalar Product
The scalar product of two vectors is A dot B equals AB cos theta, producing a scalar determined by their magnitudes and included angle. Applications include work done and projection of one vector on another, with perpendicular vectors giving zero and the scalar product distinguished from the vector product.
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