应该是相乘,以下°全部省略
原式=sin12cos12cos24cos48cos96/sin12
=sin24cos24cos48cos96/(2sin12)
=sin48cos48cos96/(4sin12)
=sin96cos96/(8sin12)
=sin192/(16sin12)
=-sin12/(16sin12)
=-1/16
应该是相乘,以下°全部省略
原式=sin12cos12cos24cos48cos96/sin12
=sin24cos24cos48cos96/(2sin12)
=sin48cos48cos96/(4sin12)
=sin96cos96/(8sin12)
=sin192/(16sin12)
=-sin12/(16sin12)
=-1/16