Jawabanmu

2014-04-12T19:36:22+07:00
Cot(x+60)° + ¹/₃ √3 = 0
cot(x+60)° + cot 60° = 0
cot(x+60)° = - cot 60°
cot(x+60)° = cot (180-60)°
cot(x+60)° = cot 120°
x + 60° = 120°
x = 60°
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