- #1
mneox
- 36
- 0
Homework Statement
if Sa: R2 -> R2 is a rotation by angle a counter-clockwise
if Tb: R2 -> R2 is a reflection in the line that has angle b with + x-axis
Are the below compositions rotations or reflections and what is the angle?
a) Sa ○ Tb
b) Ta ○ Tb
Homework Equations
I don't think you need any for this question.
The Attempt at a Solution
Can somebody explain what this question is asking..? I think I understand the concept of rotations and reflections. But how are you supposed to tell if Sa ○ Tb is a rot or ref?
I know that Sa ○ Tb means you have to do the reflection first and then the rotation, but how do you know if the composition is a rotation or reflection? I'm just confused about that.
And how would you find the angle?