RT
arctan 2 =?
反正切是反正切函數。
以來
棕褐色1.107 =棕褐色63.435º= 2
2的反正切等於2的反正切函數,等於1.107弧度或63.435度:
arctan 2 = tan -1 2 = 1.107 rad =63.435º
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