CosC=0.4
AB=12
BC, AC-?
SinC=√1-Cos²C=√1-0.4)²=√1-0.16=√0.84
SinC=AB/BC ⇒ BC=AB/SinC=12/√0.84=√144/0.84≈√171.5≈13.09
AC=√BC²-AB²=√13.09²-12²=√171.3481-144=√27.3481≈5.23
CosC=0.4
AB=12
BC, AC-?
SinC=√1-Cos²C=√1-0.4)²=√1-0.16=√0.84
SinC=AB/BC ⇒ BC=AB/SinC=12/√0.84=√144/0.84≈√171.5≈13.09
AC=√BC²-AB²=√13.09²-12²=√171.3481-144=√27.3481≈5.23