Someone called me up in the middle of the night
12-09
12-09
12-09
If you are looking for somewhere
12-09
12-09
the population of China is the largest
12-09
I dropped out of Reed College after the first
12-09
12-09
12-09
12-09
12-09
12-09
ADADADADAD
函数,正切,对边
Someone called me up in the middle of the night
12-09
12-09
12-09
If you are looking for somewhere
12-09
12-09
the population of China is the largest
12-09
I dropped out of Reed College after the first
12-09
12-09
12-09
12-09
12-09
12-09
题目tan30°=_________.可圈可点用户2021-03-16 13:51优质解答答案√3/3解析tan30°=√3/3在Rt△ABC(直角三角形)中,∠C=90°,AB是&a
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题目
tan30°=_________.
可圈可点用户
2021-03-16 13:51
优质解答
√3/3
tan30°=√3/3
在Rt△ABC(直角三角形)中,∠C=90°,AB是∠C的对边c,BC是∠A的对边a,AC是∠B的对边b,正切函数就是tanB=b/a,即tanB=AC/BC。
六种基本函数:
1、正弦函数 sinθ=y/r
2、余弦函数 cosθ=x/r
3、正切函数 tanθ=y/x
4、余切函数 cotθ=x/y
5、正割函数 secθ=r/x
6、余割函数 cscθ=r/y
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