cos²45°+sin60°*tan30°-√ (1-tan60°)²
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
计算题(根号下sin²60°-2sin60°+1)+绝对值1-3tan30°
比如tan60°,2sin45°,3tan30°
cos30°+sin45°+tan60°分之1-tan30°=?
不用计算器求值:tan30°+sin60°1−cos60°
求两个数学题X/tan30°-X/tan60°=50和tan45°X-tan30°X=10
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
sin平方30°-tan平方45°+二分之三乘tan30°-sin60°乘cos45°
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°