Hi

Problem is;

f is reflection in the y-axis and

g is the linear transformation represented by the matrix

2 3

1 1

Find the matrices representing the following linear transformations

i) f

ii) gof

iii) g^-1

now iii) is fine & ii) would be OK if I knew i)

Now, rule for a refletion has the form;

q_{θ}: R^{2}--> R^{2 }x--> qθ x

where qθ = cos(2θ) sin(2θ)

. . . . . . . sin(2θ) -cos(2θ)

So please, how do I get f from his rule.