1/4tan²45°+1/sin²30°-3cos²30°+tan45°/cos60°-s
tan²30°+cos²30°-sin²45°tan45°
计算:sin²30°+cos²45°+根号2sin60°×tan45°
计算:sin30°+cos60°+tan45°=______.
计算:sin260°+cos60°-tan45°=______.
化简:tan45°+sin420°×1/tan(-60°)+1/2(sin平方15°+cos平方15°)
/1-根号2/-(tan45°-1/2011)0次方+cos60°×(1/2)12次方+根号18求解答
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
cos平方30°+sin平方45°-1/3tan平方65°等于多少?
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
cos tan sin 30° 45° 60°是多少
化简,cos²(-α)-tan(360°+α)/sin(-α)
计算 sin30°+cos²60°-tan45°-根号3*tan30°