化简:tan(x-60°)tanx+tanxtan(x+60°)+tan(x+60°)tan(x-60°),
问题描述:
化简:tan(x-60°)tanx+tanxtan(x+60°)+tan(x+60°)tan(x-60°),
答
化简:tan(x-60°)tanx+tanxtan(x+60°)+tan(x+60°)tan(x-60°),