b=(√3-1)asinB = (√3-1)sinAC=30°A +B=150°sinB = (√3-1)sin(150°-B) = (√3-1)(sin150°cosB-cos150°sinB) = (√3-1)(1/2cosB+√3/2sinB)2sinB = (√3-1)cosB+(3-√3)sinB(√3-1)sinB = (√3-1)cosBtanB=1B=...