Mathematics
Undergraduate
この矢印の変化が分かりません💦🙇♂️
12
12
£ 20
-Tan-¹ とおくと
13/531
-(-13)-Tan-¹12-& Snizoni
5
-Cos-¹
5
13
1263
200) n
(5) x=Cos-¹
x=Cos ¹(-
=Cos-1
- (-1/3)-
であるから
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