Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.4: Plane Curves And Parametric Equations
Problem 33E
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I keep getting does not exist but that is not an option
Expert Solution
Step 1: find what equates x and what equates y
We need to find the slope of the tangent to the parametric curve c(t)=(cos t, sin t ) at the point (-1/2, -√3)
C(t)=(cos t, sin t )
x= cos t ....(1)
y= sin t ...(2)
Step 2: Find dx/dt
x= cos t
Differentiating both sides w.r.t t we get
dx/dt = -sin t [ derivative of cos A is -sin A]
dx/dt = -y [from equation 2 [refer step 1] ]
At point (-1/2, -√3),
dx/dt = -(-√3) = √3
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