Expression 1: "r" equals left bracket, 1 , 2 , ... "K" , right bracket left parenthesis, cos 4 theta plus 4 , right parenthesis left brace, 2 pi times random left parenthesis, "K" , right parenthesis less than or equal to theta less than or equal to pi plus 2 pi times random left parenthesis, "K" , right parenthesis , right bracer=1,2,...Kcos4θ+42π·randomK≤θ≤π+2π·randomK
domain \theta Minimum: 00
less than or equal to theta less than or equal to≤θ≤