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One day I received a call from a colleague
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If you don’t like to swim you as well stay at home
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For thousands of years,people have been
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ADADADADAD
余弦,定理,角形
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One day I received a call from a colleague
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If you don’t like to swim you as well stay at home
12-09
For thousands of years,people have been
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题目在△ABC中，角A、B、C所对的边分别为a、b、c，若a=1，b=，c=，则B=（ ）。可圈可点用户2021-03-07 12:23优质解答答案考点名称：余弦定理余弦定理：三角形任意一边的平方等于其他两边的平方的和减去这两边与它们
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题目
在△ABC中，角A、B、C所对的边分别为a、b、c，若a=1，b=，c=，则B=（ ）。
可圈可点用户
2021-03-07 12:23
优质解答
答案
考点名称：余弦定理余弦定理： 三角形任意一边的平方等于其他两边的平方的和减去这两边与它们夹角的余弦的积的两倍， |
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