" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2 cos 2x sin (-x) = 0
cos 2x sin x = 0
(1 - 2 sin² x)(sin x ) = 0
sin² x = ½
sin x = ½√2
x = 45°
atau
sin x = 0
x = 0°
X = a + k. 360° atau x = (180 - a)° + k. 360°
untuk k = 0
x = 45° + 0. 360°
x = 45°
atau
x = (180 - 45)° + 0. 360°
x = 135°
atau
x = 0° + 0. 360°
x = 0°
atau
x = (180 - 0)° + 0. 360°
x = 180°
Himpunan penyelesaian :
{0°, 45°, 135°, 180°}