f(x)=2*[1+cos(2x+2a)]/2+√3sin(2x+2a)
=√3sin(2x+2a)+cos(2x+2a)+1
=2[sin(2x+2a)√3/2+cos(2x+2a)*1/2]+1
=2[sin(2x+2a)cosπ/6+cos(2x+2a)sinπ/6]+1
=2sin(2x+2a+π/6)+1