# R = sqrt(a^2+b^2) # # a sin x + b cos x = R(a/R sin x + b/R cos x) = R sin (x + alpha) #
where #a/R = cos alpha# and #b/R = sin alpha# such that # alpha = arctan (b/a) #
# sqrt(3) sin x + cos x = 2 sin (x + pi/6) = 1 # # sin (x + pi/6) = 1/2 #
# x + pi/6 = npi + (-1)^npi/6, " " n in ZZ # # x = (6n+(-1)^n-1)pi/6, " " n in ZZ #