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正弦定理与余弦定理练习
正弦定理与余弦定理 · 1–12
用正弦定理或余弦定理求解，结果精确到十分位。
1.a = 12, b = 12, c = 7C ≈
2.a = 12, b = 5, c = 15C ≈
3.a = 16, b = 10, c = 17C ≈
4.a = 9, b = 11, c = 18C ≈
5.a = 15, b = 15, c = 4C ≈
6.a = 19, b = 13, c = 16C ≈
7.a = 13, b = 12, c = 12C ≈
8.a = 5, b = 19, c = 18C ≈
9.a = 17, b = 11, c = 13C ≈
10.a = 16, b = 15, c = 4C ≈
11.a = 18, b = 7, c = 14C ≈
12.a = 20, b = 13, c = 12C ≈
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