Calculus
posted by Anonymous .
I am having trouble solving this problem:
"Find where the tangent line is horizontal for r=1+cos(theta)"
I would really appreciate the feedback, I'd like to know how to go about solving problems like these. Thank you!

Calculus 
Damon
Where the derivative is zero
dr/dT =  sin T
so when T = 0 or n * pi
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