2sin60°+cos45°-tan60°•cos30
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
(sin30°)/(sin60°−cos45°) - tan60° 等于多少?
sin45°/(cos60°-tan60°)+cos45°×cos30°=
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
(sin30°-cos45°)(cos30°+sin45°)/(cos45°的平方+tan30°*sin60°)-3ta
sin60°×cos60°+sin45°×cos45°-sin30°×cos30°等于多少
sin30° sin45° sin60° cos30° cos45° cos60° 以此类推,都等于多少
计算:sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°+根号8的立方
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
Sin30°=?;Sin45°=?;Sin60°=?;Cos30°=?;Cos45°=?;Cos60°=?;tan30°