tan45°+5cot30°-6tan60°-2cos60°
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
三角函数的特殊角的值tan30°cos30°sin30°tan45°cos45°sin45°tan60°cos60°si
计算:sin30°+cos60°+tan45°=______.
计算:sin260°+cos60°-tan45°=______.
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
sin45°/(cos60°-tan60°)+cos45°×cos30°=
/1-根号2/-(tan45°-1/2011)0次方+cos60°×(1/2)12次方+根号18求解答
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°