| 单词 | law of tangents |
| 释义 | law of tangents [`lȯ ǝv `tan·jǝns] MATHEMATICS Given a triangle with angles A, B, and C and sides a, b, c opposite these angles respectively: (a - b )/(a + b ) = [tan 1/2(A - B )]/[tan 1/2(A + B )]. |
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