Angle between the vectors (i+j) and (j-k) is - Vidyadip

MCQ

Angle between the vectors $(\hat{i}+\hat{j})$ and $(\hat{j}-\hat{k})$ is

A
$90^{\circ}$
B
$0^{\circ}$
C
$180^{\circ}$
✓
$60^{\circ}$

✓

Answer

Correct option: D.

$60^{\circ}$

(d) $\cos \theta=\frac{\vec{A} \cdot \vec{B}}{|\vec{A}||\vec{B}|}=\frac{1}{\sqrt{2} \sqrt{2}}=\frac{1}{2} \therefore \theta=60^{\circ}$

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