sin²30°+2sin60°+tan45°-tan60°+cos²30°
计算:sin²30°+cos²45°+根号2sin60°×tan45°
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
tan²30°+cos²30°-sin²45°tan45°
sin60°/cos30°-tan45° “/”是分之的意思
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
sin平方30度+cos平方45度+根号3sin60度*tan45度
sin平方120°+cos180°+tan45°-cos平方(-330°)+sin(-210°)