giải pt: $cos13x=cos4x.cos3x$
$cos13x=cos4x.cos3x$
Started By faraanh, 20-04-2013 - 20:09
#1
Posted 20-04-2013 - 20:09
thinking about all thing what you say but do not saying all thing what you think
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users