What is the cross product magnitude if , , and the angle between them is ?

Answer and explanation

Correct answer: C.

  1. Step 1: The formula for the magnitude of cross product is .
  2. Step 2: Substitute given values: .
  3. Step 3: Evaluate: .
Answer
.
Why not the others: '' ignores the factor; '' uses (which gives the dot product); '' divides 20 by 2.

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