(2008•沐川县一模)计算:sin213°+cos213°+sin60°-tan30°.
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
2sin30°·cos45°-(sin60°)负二次方+根号3tan30°
不用计算器求值:tan30°+sin60°1−cos60°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
(sin30°-cos45°)(cos30°+sin45°)/(cos45°的平方+tan30°*sin60°)-3ta
Sin30°=?;Sin45°=?;Sin60°=?;Cos30°=?;Cos45°=?;Cos60°=?;tan30°
sin平方30°-tan平方45°+二分之三乘tan30°-sin60°乘cos45°
计算题(根号下sin²60°-2sin60°+1)+绝对值1-3tan30°
(2012•海门市一模)(1)计算:−12012+(12)−2−(tan62°+2π)0+|27−8sin60°|,
sin60°是多少
(2010•天桥区二模)(1)计算:13+1+(3-π)0-sin60°
(2014•响水县二模)(1)计算:(12)2-2sin60°+12; &