Jawabanmu

Jawaban paling cerdas!
2014-05-06T11:19:22+07:00
sin x.cos x- cot x = 0
SinxCosx = Cotx
SinxCosx = Cosx/sinx    ruas kiri dan kanan dibagi cosx
sinx = 1/sinx
sin²x = 1
Sin²x - 1 = 0
(sinx + 1)(Sinx -1) = 0
Sinx = -1      atau sinx = 1
     x = 270'                x = 90'
HP {90' , 270'}