solutions-jasik.txt

Chapter 7
Problem 2
Description
r = @(theta) 3.*sin(3.*cos(0.5.*theta))
r(pi/6)
r(5*pi/6)
theta = 0:0.01:(4*pi);
polarplot(theta,r(theta))

Problem 11
Description
GPA = @(G,C) round(sum((70-double(G)).*C)/sum(C),1);
Grades = ['A','B','F','C','B','A','D','A'];
CreditHours = [4,3,3,2,3,4,3,3];

GPA(Grades,CreditHours)


Problem 12
Description
dist = @(A,B) sqrt((B(1)-A(1))^2+(B(2)-A(2))^2+(B(3)-A(3))^2);
dsqr = @(A,B) dist(A,B)^2;
theta = @(A,B,C) acos((dsqr(A,C)-dsqr(A,B)-dsqr(B,C))/(2*dist(A,B)*dist(B,C)));
A = [-5,-1,6]; B = [2.5,1.5,-3.5]; C = [-2.3,8,1];
theta(A,B,C)
A = [-5,5,0,0]; B = [3.5,-6.5,0]; C= [0,7,0];
theta(A,B,C)