" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
proyeksikan titik C pada garis AB sehingga membentuk titik C'
buatlah segitiga siku siku CFC'
panjang CC' = √(17² - 8²)
= √225
= 15
panjang FC' = √(20² + 15²)
= √625
= 25
sudut α terletak pada sudut CC'F
cosα = 15/25
= 3/5