解作过P点做底面三角形ABC的射点为O,作PD垂直BC于D点S(ABC)=AB^2*√3/4=9√3AB=6AD=3√3角OBC=30OA=OB=BD/cos30=2√3OD=√3侧面积=3*BC*PD/2=27PD=3PO^2=PD^2-OD^2=9-3=6PO=√6PA与底面所成的角XtanX=OP/AO=√6/(2√...