Question

第二题过程，，谢谢

Answer 1

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追答

∴(m−3)2+n2
=m2+n2−6m+9
=−3√2(sinθ+cosθ)+10
=−6sin(θ+π/4)+10

补充：
(m−3)²+n²
=m²+n²−6m+9
=−3√2(sinθ+cosθ)+10
=−6sin(θ+π/4)+10