If \(\overrightarrow {{\rm{a}}} \) and \(\overrightarrow {{\rm{b}}} \) are vectors such that \(\overrightarrow {|{\rm{a|}}} { = 2,{\rm{\;}}\overrightarrow {|{\rm{b}|}} }= 7\) and \(\overrightarrow {{\rm{a\;}}} \times {\rm{\;\vec b}} = 3{\rm{\hat i}} + 2{\rm{\hat j}} + 6{\rm{\hat k}},\) then what is the acute angle between \(\overrightarrow {{\rm{a}}} \) and \(\overrightarrow {{\rm{b}}} \)?
1
30°
2
45°
3
60°
4
90°