---> x = (180^o - α) + K.360^o
2. Cos x = Cos α
---> x = α + K.360^o
---> x = -α + K.360^o
3. tan x = tan α
---> x = α + K.180^o
kembali ke soal :
sin x = -1/2
sin x = sin 210^o
x = α + K.360^o
---> x = (180^o - α) + K.360^o
2. Cos x = Cos α
---> x = α + K.360^o
---> x = -α + K.360^o
3. tan x = tan α
---> x = α + K.180^o
kembali ke soal :
sin x = -1/2
sin x = sin 210^o
x = α + K.360^o
Editor: Muhammad Khusaini