" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a zatem tg 20 - tg 21 < 0
stąd |tg20-tg21| = -(tg20 - tg21)= tg21 - tg20 = -tg20 + tg21
Odpowiedź D