问答题
利用极坐标变换x=rcosφ,y=rsinφ变换下列表达式:a)
b)
c)
A.174.24.96:6088/Latex/latex.action?latex=dz1cZnJhY3tccGFydGlhbF4yIHV9e1xwYXJ0aWFsIHheezJ9fStcZnJhY3tccGFydGlhbF4yIHV9%0D%0Ae1xwYXJ0aWFsIHleezJ9fQ%3D%3D'
B.174.24.96:6088/Latex/latex.action?latex=eF57Mn1cZnJhY3tccGFydGlhbF4yIHV9e1xwYXJ0aWFsIHheezJ9fSsyeHlcZnJhY3tccGFydGlh%0D%0AbF4yIHV9e1xwYXJ0aWFsIHhccGFydGlhbCB5fSt5XnsyfVxmcmFje1xwYXJ0aWFsXjIgdX17XHBh%0D%0AcnRpYWwgeV57Mn19'
C.174.24.96:6088/Latex/latex.action?latex=dz15XnsyfVxmcmFje1xwYXJ0aWFsXjIgdX17XHBhcnRpYWwgeF57Mn19LTJ4eVxmcmFje1xwYXJ0%0D%0AaWFsXjIgdX17XHBhcnRpYWwgeFxwYXJ0aWFsIHl9K3heezJ9XGZyYWN7XHBhcnRpYWxeMiB1fXtc%0D%0AcGFydGlhbCB5XnsyfX0tKHhcZnJhY3tccGFydGlhbCB1fXtccGFydGlhbCB4fSt5XGZyYWN7XHBh%0D%0AcnRpYWwgdX17XHBhcnRpYWwgeX0p'