anonymous
  • anonymous
Find the slope of the tangent line to the polar curve r=sin(4θ) at θ=π/8.
Calculus1
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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jim_thompson5910
  • jim_thompson5910
this page may be of help http://tutorial.math.lamar.edu/Classes/CalcII/PolarTangents.aspx
anonymous
  • anonymous
still am confused
jim_thompson5910
  • jim_thompson5910
where are you stuck in the article?

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anonymous
  • anonymous
it has cos and ii am trying to find (sin) in my problem
jim_thompson5910
  • jim_thompson5910
x = r*cos(theta) x = sin(4theta) * cos(theta) ... replace 'r' with 'sin(4theta)' what do you get when you derive both sides with respect to theta?
anonymous
  • anonymous
r/r*cos ??
jim_thompson5910
  • jim_thompson5910
if the theta's are throwing you off, then think of them as x ie think of it as y = sin(4x)*cos(x) what is dy/dx here?
anonymous
  • anonymous
idk
jim_thompson5910
  • jim_thompson5910
use the product and chain rule here

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