Contact us
Choose a category below so we can get back to you as quickly as possible.
不明白你的意思,等號關係是相對的,tan45=1也就是1=tan45,如果你是指反三角函數的話那麼是 arctan1=45°+180°*k(k是整數)
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.