" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
sin²α-2sinαcosα+cos²α=1/4
1-2sinαcosα=1/4
2sinαcosα=3/4
sinα*cosα=3/8
Odp. C