问题标题：
【cos(8x+6)的导数cos(8x+6)=cos(8x)cos6-sin(8x)sin6{cos(8x)cos6}'=-8sin(8x)cos6-cos(8x)sin6{-sin(8x)sin6}'=-8cos(8x)sin6-sin(8x)cos6原式’=-8sin(8x)cos6-cos(8x)sin6-8cos(8x)sin6-sin(8x)cos6】
问题描述：
cos(8x+6)的导数
cos(8x+6)=cos(8x)cos6-sin(8x)sin6
{cos(8x)cos6}'=-8sin(8x)cos6-cos(8x)sin6
{-sin(8x)sin6}'=-8cos(8x)sin6-sin(8x)cos6
原式’=-8sin(8x)cos6-cos(8x)sin6-8cos(8x)sin6-sin(8x)cos6
刘懿回答：
答案:-8sin(8x+6)绝对没错我刚高考完.另:cos(8x+6)=cos(8x)cos6-sin(8x)sin6{cos(8x)cos6}'=-8sin(8x)cos6-cos(8x)sin6{-sin(8x)sin6}'=-8cos(8x)sin6-sin(8x)cos6原式’=-8sin(8x)cos6-cos(8x)sin6-8cos(8x)si...
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