sin30°/(cos45°—cos60°)—2cos45°+根号3tan30°等于多少?
sin30°/(cos45°—cos60°)—2cos45°+根号3tan30°
=1/2÷(√2/2-1/2)-√2+√3*(√3/3)
=1/(√2-1)-√2+1
=(√2+1)-√2+1
=2
多谢支持
sin30°/(cos45°—cos60°)—2cos45°+根号3tan30°等于多少?
sin30°/(cos45°—cos60°)—2cos45°+根号3tan30°
=1/2÷(√2/2-1/2)-√2+√3*(√3/3)
=1/(√2-1)-√2+1
=(√2+1)-√2+1
=2
多谢支持