sin²45°-cos60°- tan45°分之cos30° +2sin²60°乘tan60°
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
sin平方45°+tan60°×cos30°等于多少?
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
三角函数的特殊角的值tan30°cos30°sin30°tan45°cos45°sin45°tan60°cos60°si
sin45°/(cos60°-tan60°)+cos45°×cos30°=
sin60°/cos30°-tan45° “/”是分之的意思
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
数学题sin30°+ cos30°- tan45°
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
计算:sin²30°+cos²45°+根号2sin60°×tan45°
计算:sin30°+cos60°+tan45°=______.