1.根号3cos30°+根号2sin45°=√3*√3/2+√2*√2/2=3/2+1=5/22.sin60°分之tan45°-cos60°×tan30°=1/(√3/2)-1/2*√3/3=2√3/3-√3/6=√3/23（sin60°+cos45°）（sin60°-cos45°） =sin²60°-cos²45...