cos60°+sin45°/cos60°-sin45° + cos60°-cos45°/cos60°+cos45°
问题描述:
cos60°+sin45°/cos60°-sin45° + cos60°-cos45°/cos60°+cos45°
答
cos60°+sin45°/cos60°-sin45° + cos60°-cos45°/cos60°+cos45°