Question
Let $ \vec{a} $ and $ \vec{b} $ be two vectors inclined at an angle of $60^\circ$. If $ |\vec{a}| = |\vec{b}| = 2$, what is the angle between $ \vec{a} $ and $ \vec{a} + \vec{b} $?
Let $ \vec{a} $ and $ \vec{b} $ be two vectors inclined at an angle of $60^\circ$. If $ |\vec{a}| = |\vec{b}| = 2$, what is the angle between $ \vec{a} $ and $ \vec{a} + \vec{b} $?