Help me find normal to this equ.

  • Thread starter david90
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  • #1
david90
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r(t) = <acos t , bsin t>
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
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Now, how about you go back, read the question again and the give it exactly.

In the first place an equation doesn't have a normal, a curve does.

If you mean, "find the equation for the normal to the curve given by r(t) = <acos t , bsin t> for any t", then say so.

Heres' a major hint the vector <a, b> is always normal to the vector <-b, a>.
 
  • #3
ShawnD
Science Advisor
712
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In order to have a normal, you need to give us 1 set of coordinates.
 

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