Find the slope of the polar curve at the indicated point. r=8(1+cos theta) theta=pi/4 I must be doing it wrong because I took the derivative of r and got: dr/dtheta = -8sin theta= -4 radical 2. The answer is 1-radical 2 Whats my error?
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Originally Posted by krzyrice Find the slope of the polar curve at the indicated point. r=8(1+cos theta) theta=pi/4 I must be doing it wrong because I took the derivative of r and got: dr/dtheta = -8sin theta= -4 radical 2. The answer is 1-radical 2 Whats my error? . So when .
yes that is what i got but the answer is 1-radical 2
Originally Posted by krzyrice yes that is what i got but the answer is 1-radical 2 Then either the answer is wrong or you copied down the question wrongly.
weird. i didn't copy the problem wrong. it must be a coincidence because it seems the problem after that is wrong too
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