1.If a⃗+b⃗=c⃗\vec{a}+\vec{b}=\vec{c}a+b=c, ∣a⃗∣=20|\vec{a}|=20∣a∣=20, ∣b⃗∣=20|\vec{b}|=20∣b∣=20, and ∣c⃗∣=203|\vec{c}|=20\sqrt{3}∣c∣=203, then the angle between a⃗\vec{a}a and b⃗\vec{b}b isa.60∘60^\circ60∘b.30∘30^\circ30∘c.45∘45^\circ45∘d.120∘120^\circ120∘Login to continueOnly logged in users canattempt or see the solution.
