RT
x正弦的反餘弦。
x的正弦的反餘弦等於(當k為整數ķ ∈ℤ):
arccos(sin x)=π/ 2-arcsin(sin x)
=π/ 2-(x +2 kπ)
= -x -2 kπ +π/ 2
= -x +(0.5-2 k)π
Arccos功能►
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