" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2 cos²x = 1 + cos 2x
cos²x = 1/2 + 1/2 cos 2x
sin²x = 1 - (1/2 + 1/2 cos 2x)
= 1/2 - 1/2 cos 2x
b. - cos²x = - (1/2+1/2 cos 2x)
c.
soal C perlu di konfirmasi