tan45°-cos60°/sin60°×tan30°
问题描述:
tan45°-cos60°/sin60°×tan30°
答
(1-1/2)/(√3/2)×(√3/3)
=(1/2)/(1/2)
=1
我按计算机的算出也是1
答
2/3
tan45°=1
cos60°=1/2
sin60°=√3/2
tan30°=√3/3
答
tan45°-cos60°/sin60°×tan30°
=1-(1/2)/(√3/2)×(√3/3)
=1-(1/2)/(1/2)
我不知道分子就是1/2还是1-1/2
自己算吧
答
tan45°-cot60°×tan30°
=1-(1/√3)×(1/√3)
=1-1/3
=2/3