How do you change the rectangular equation #x+y=0# into polar form?

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Answer 1 · 2016-09-17T17:40:47

#tan theta=-1#

#x+y=0#

#r*cos theta+r*sin theta=0#

#cos theta+sin theta=0#

#cos theta/cos theta+sin theta/cos theta=0/cos theta#

#1+tan theta=0#

#tan theta=-1#

God bless....I hope the explanation is useful.