Question

The resultant of the two vectors having magnitude 2 and 3 is 1. What is their cross product

• A. 6
• B. 3
• C. 1
• D. 0

Answer 1

Answer: (D)

0

Answer 2

$\sqrt{2^{2} + 3^{2} + 2 \times 2 \times 3 \times \cos\theta} = 1$

By solving we get $\theta = 180{^\circ}$∴ $\overrightarrow{A} \times \overrightarrow{B} = 0$