sin60°的相反数是?tan60°等于?
(sin30°)/(sin60°−cos45°) - tan60° 等于多少?
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
sin30 sin45 sin60 tan30 tan45 tan60 的值各是多少
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
√12*sin60° 等于多少
sin60°/cos30°-tan45° “/”是分之的意思
sin平方45°+tan60°×cos30°等于多少?
sin60°是多少
(tan60°-1)的负一次方=?