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tan x = 60 ( kenapa 60, karena sdh rmusnya)
£ (dilambangkan alfa)
jawab : 1) x = £ + k . 180
k → 1 = 60 + 1 . 180 = 240
2) x = £ + k . 180
k → 0 = 60 + 0 . 180 = 60
maka hp { 60, 240 }