Giải phương trình
a)Sin4x+3cos2x
b)tanbìnhx+2/cotx-3
C)9cos4x-2cos2x=7

Just turn the whole gym into pie

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )