Two vectors having equal magnitude of 5 units, have an angle of 60° between them. Find the magnitude of their resultant vector and its angle from one of the vectors.

$a = b = 5 u n i t$ and $θ = 60 °$

$R = \sqrt{a^{2} + a^{2} + 2 a^{2} \cdot \cos (60 °)} = a \sqrt{3} = 5 \sqrt{3} u n i t$

$\tan (α) = \frac{a \sin (60 °)}{a + a \cos (60 °)} = \frac{\frac{\sqrt{3}}{2}}{\frac{3}{2}} = \frac{1}{\sqrt{3}} o r \tan (30 °)$

Therefore, $α = 30 °$

Two vectors having equal magnitude of $5$ units, have an angle of $60 °$ between them. Find the magnitude of their resultant vector and its angle from one of the vectors.