Question

Tolong jawab please jawab

Answer 1

Samakan fungsi sudut dahulu
cos (x-30) = - sin 50 0< x < 360
cos (x-30) = cos ( 270 - 50)
pake persamaan trigono cos
× - 30 = 270 - 50 + k 360
x = 250 + k 360
cek smbil liat batas
k = 0 >>>> x = 250
persamaan trigono cos yang satu lagi
x = -190+ k 360
k = 1 >>> x = 170
jawabannya C ( 170, 250)