Given that A , + , B , = , C ,. If | A | , = ,4, , , | B | , = ,5… - Vidyadip

MCQ

Given that $\vec A\, + \,\vec B\, = \,\vec C\,.$ If $\left| {\vec A} \right|\, = \,4,\,\,\left| {\vec B} \right|\, = \,5\,\,$ and $\left| {\vec C} \right|\, =\,\sqrt {61}$ the angle between $\vec A\,\,$ and $\vec B$ is ....... $^o$

A
$30$
✓
$60$
C
$90$
D
$120$

✓

Answer

Correct option: B.

$60$

b

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