极坐标转换为直角坐标
(a)
(19,派/3)
(x,y)=(19cosπ/3,19sinπ/3)=(19/2,19√3/2)
(b)
(−9,3派/4)
(x,y)=(-9cos3π/4,-9sin3π/4)=(9√2/2,-9√2/2)
规律:
直角坐标(x,y)=(极值cos角度,极值sin角度)
极坐标转换为直角坐标
(a)
(19,派/3)
(x,y)=(19cosπ/3,19sinπ/3)=(19/2,19√3/2)
(b)
(−9,3派/4)
(x,y)=(-9cos3π/4,-9sin3π/4)=(9√2/2,-9√2/2)
规律:
直角坐标(x,y)=(极值cos角度,极值sin角度)