" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
Bab TrigonometriMatematika SMA Kelas X
1 - tan θ sin 2θ = -5/13
1 - (sin θ/cos θ) . 2 . sin θ cos θ = -513
1- 2 sin² θ = -5/13
cos 2θ = -5/13
cos 4θ = 2 cos² 2θ - 1
= 2 (-5/13)² - 1
= 2 . 25/169 - 1
= (50 - 169)/169
= -119/169