d Calculate ri(t) · r2(t)] and ri(t) × r2(t)] first by differentiating d dt the product directly and then by applying the formulas dt d dr2 dri Ir.(t) - ra(t)) = ri(t)- + r2(t) and dt dt dt d [r:(t) × r2(t)] = ri(t) × dr2 dri x r2(t). %3| dt dt dt ri(t) = cos(t)i+ sin(t)j+ 2tk, r2(t) = i+ tk d ri(t) · r2(t)] dt d d ri(t) x r2(t)]

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.2: Determinants
Problem 20EQ
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d
d
Calculate ri(t) · r2(t)] and ri(t) × r2(t)] first by differentiating
dt
the product directly and then by applying the formulas
dt
d
ri(t) • r2(t)] = r1(t) -
dr2 dri
+
dt
dt
r2(t) and
dt
d
ri(t) x r2(t)] = ri(t) x
dr2
dr1
+
dt
x r2(t).
dt
dt
r1(t) = cos(t)i + sin(t)j+ 2tk, r2(t) = i+ tk
d
ri(t) · r2(t)] :
dt
d
r:(t) x r2(t)]
%3D
Transcribed Image Text:d d Calculate ri(t) · r2(t)] and ri(t) × r2(t)] first by differentiating dt the product directly and then by applying the formulas dt d ri(t) • r2(t)] = r1(t) - dr2 dri + dt dt r2(t) and dt d ri(t) x r2(t)] = ri(t) x dr2 dr1 + dt x r2(t). dt dt r1(t) = cos(t)i + sin(t)j+ 2tk, r2(t) = i+ tk d ri(t) · r2(t)] : dt d r:(t) x r2(t)] %3D
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