(1)sin45°-cos60°+tan60°=

2024-12-01 10:01:52
推荐回答(1个)
回答(1):

(1)sin45°-cos60°+tan60°=√2/2-1/2+√3
(2)cos²30°+sin²30°-tan45°=3/4+1/4-1=0

(3)sin30°-tan30°+cos45°=1/2-√3/3+√2/2

(4)cos30°-sin45°/sin60°-cos45°=√3/2-(√2/2)/(√3/2)-√2/2=√3/2-√6/3-√2/2
(5)sin²30°+2sin60°+tan45°-tan60°+cos²30°
=1/4+√3+1-√3+3/4
=1+1
=2