Mathematics
Undergraduate
途中式お願いします。
[28] 次の△ABCの面積を求めよ.
(1) a= 2, b = 3, C = 60°
(3) a = 6, A= B = 75°
(5) a = 5, b= 7, c = 8
(2) b = 3, c= 5, A = 135°
(4) a = 3, b = 3, c = 4
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