An object moves with velocity vector (t,t?,-t) starting at (1,2,3) when t=0. Find the function r giving its location.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.3: Vectors
Problem 60E
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Activity (calculus of vector function)
1. An object moves with velocity vector (t,t²,-t) starting at (1,2,3) when t=0. Find the
function r giving its location.
2. Show, using the rules of cross products and differentiation, that
d/dt (r(t) x r'(t)) = r(t) × r"(t).
3. Find a vector function for the line tangent to ( cost , sint , cos(6t) ) when t = t/7.
4. Find the cosine of the angle between the curves (cost, -sin(t)/5, sint) and
(cos(tt/3), sin(t/3), t) where they intersect.
Transcribed Image Text:Activity (calculus of vector function) 1. An object moves with velocity vector (t,t²,-t) starting at (1,2,3) when t=0. Find the function r giving its location. 2. Show, using the rules of cross products and differentiation, that d/dt (r(t) x r'(t)) = r(t) × r"(t). 3. Find a vector function for the line tangent to ( cost , sint , cos(6t) ) when t = t/7. 4. Find the cosine of the angle between the curves (cost, -sin(t)/5, sint) and (cos(tt/3), sin(t/3), t) where they intersect.
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