Jawabanmu

2014-06-23T08:24:57+07:00
A.√2  sin⁡x-1=0 √2 Sinx = 1 Sinx = 1/√2 Sinx = 1/2 √2 Sinx = sin 45 X1 = 45 X2 = (180 - 135) + k.O X2= 135 HP = {45, 135}  b. 2 cos 2x + 1 = 0 Cos 2x = -1/2 Cos 2x = cos 120 2x = 120 X = 60 X2 = (360 -300) + k.O X2= 300 HP = {60,300}
Kenapa jadi berantakan gitu ya-_- perasaan tadi teratur ke bawah aku ngetiknya-.
2014-06-23T09:26:08+07:00
A.√2 sin x-1=0
sin x=1/2√2
sin x=sin 45
x=45+k.360 atau x=135+k.360
k(0)»x=45,135
hp={45,135}

B.2cos 2 x+1=0
cos2x=-1/2
cos2x=cos 120
x=60+k.360 atau x=-60 +k.360
k(0)»x=60,-60
k(1)»x=420,300
hp={60,300}