Question

The magnitude of vector $\overset{\rightarrow}{A},\overset{\rightarrow}{B}$ and $\overset{\rightarrow}{C}$ are respectively 12, 5 and 13 units and $\overset{\rightarrow}{A} + \overset{\rightarrow}{B} = \overset{\rightarrow}{C}$ then the angle between $\overset{\rightarrow}{A}$ and $\overset{\rightarrow}{B}$ is

• A. 0
• B. $\pi$
• C. $\pi/2$
• D. $\pi/4$

Answer 1

Answer: (C)

$\pi/2$

Answer 2

$C = \sqrt{A^{2} + B^{2}}$

The angle between A and B is $\frac{\pi}{2}$