40. 球面三角學中,敘述「兩對邊角」之關係式為下列何者?
(A)正弦律(sine law)
(B)邊餘弦律(side cosine law)
(C)角餘弦律(angle cosine law)
(D)四部公式 (four-parts formulae)

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統計: A(10), B(8), C(4), D(0), E(0) #3013434