Выражения1) tg^2a/1+tg^2a * 1+ctg^2a/ctg^2a -tg^2a2) sin (a+b) + sin (a-b)/sin (a-b) - sin(a-b)3) sin11*cos15+sin15*cos11/sin18*cos12+sin12*cos18​

Does  english  contain a very large vocabularly?   does  modern  english contain a very large  or  small vocabularly? modern english contains  a very large vocabularly,  doesn't it?   what  language  contains  a  very  large  vocabularly?   what  size  of  vocabularly  does  english  contain?