" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
P² = q² + r² - 2qr cos p8² = 12² + 18² - 2*12*18 cos p
64 = 144 + 324 - 432 cos p
64 = 468 - 432 cos p
432 cos p = 468 - 64
432 cos p = 404
cos p = 404 / 432 = 101 / 108
jawaban tidak ada di pilihan, maaf kalau salah ^_^