Mohon BantuannyaYang B aja​

Jawab:

2 sin ( 3x + 60)  = 1

sin (3x + 60)=  1/2 = sin 30

3x+ 60 = 30 + k. 360  atau 3x + 60 = 150 +k. 360

3x=  -30 + k. 360  atau 3x  = 90 +k. 360

x = – 10 + k .120  atau   x =  30 + k. 120

k = { – 2, – 1 , 0 , . . . }

k = -2 , x = -250, x = – 210

k = – 1 , x = – 130, x = -90

k = 0 , x = – 10 , x = 30

k = 1 , x =  110 , x = 150

k = 2 , x = 230, x = 270

untuk x [ -180, 180] , x =(-130,-90,  -10, 30, 110, 150}