" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
cos a = de/sa = 15/17
sec a = 17/15
sin = de/mi = -8/17
sin a . cos a = -8/17 . 15/17 = -120/289 = 0,41