xM=2cos(-π/3)=1,yM=2sin(-π/3)=-√3
M(1,-√3)
N(2,0)
xP=2√2cosπ/6=√6,yP=2√2sinπ/6=√2
P(√6,√2)
kMN=√3,KNP=√2/(√6-2)=1/(√3-√2)=√3+√2
∵kMN≠KNP
∴M,N,P三点不共线