2#
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小 發表於 2022-3-25 07:32 PM (第 735 天)
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回覆 2# 風之男 的帖子
Thank you very much for your help, I think I solved it; I drew the argand diagram, and the angle at the centre of the circle is 90º. Then I can form a right angled isosceles triangle with the hypotenuse length 2 and so the shorter sides must be sqrt2.
Sorry, I don't have the answer for it, can I ask you to confirm my answer of the equation being x^2+(y-1)^2=2 ?