Find the angles between the vectors to the nearest hundredth of a radian Find the angles between the vectors to the nearest hundredth of a radian $u=2i+j , v=i+2j-k $

we have $$\cos(\phi)=\frac{\vec{u}\cdot\vec{v}}{|\vec{u}||\vec{v}|}$$ this is $$\cos(\phi)=\frac{4}{\sqrt{5}\sqrt{6}}$$ $$\phi \approx 43.09^{\circ}$$ or $$0.75$$ in radians