计算:(1)cos45°=sin45°=_____;(2)sin30°+cos60°+tan45°=_____;(3)sin60°/cos60°=_____;(4)tan60°-
计算:
(1)cos45°=sin45°=_____;
(2)sin30°+cos60°+tan45°=_____;
(3)sin60°/cos60°=_____;
(4)tan60°-tan30°=_____;