Linear Algebra and Its Applications · Problem 3.2.22

Orthogonality — Gilbert Strang

Mathematics · cosines-projections-onto-lines

Problem

Project

b = (1,0,0)

onto the lines through

a_1

and

a_2

in Problem 21 and also onto

a_3 = (2,-1,2)

. Add the three projections

p_1 + p_2 + p_3