求值sin30°,tan45°+根号2,cos45°+sin60,tan60°,分别求出,
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
|cos45°-sin60°|+根号sin30°
(sin30°)/(sin60°−cos45°) - tan60° 等于多少?
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
2sin30°·cos45°-(sin60°)负二次方+根号3tan30°
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
计算:sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°+根号8的立方
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
三角函数的特殊角的值tan30°cos30°sin30°tan45°cos45°sin45°tan60°cos60°si