2Cos² X + Cos X - 1 = 0
Jawaban:
Misal cox=a
(2a-1) (a+1) =0
a=1/2 atau =-1
COS X=1/2=cos 60 cos x= -1=cos 180
×=60,180
[answer.2.content]Jawaban:
Misal cox=a
(2a-1) (a+1) =0
a=1/2 atau =-1
COS X=1/2=cos 60 cos x= -1=cos 180
×=60,180
[answer.2.content]