Question

what is the function for a 90 degree rotation?

Answer 1

Clockwise or counterclockwise?

Answer 2

clockwise

Answer 3

my bad - i should've specified

Answer 4

(x,y) -> (-y,x)

Yeah s:
I'm guessing you should have this in your notes though. It's important to know all rules

Answer 5

is there an exact function to switch the negative/positive signs?

Answer 6

i haven't worked on this in so long haha

Answer 7

No, just invert the sign

Flip the x and y and negate the y value

if its negative, then its positive. If it's positive then its negative

ie. (5,7) --> (-7,5)

Answer 8

okay thanks. i wasn't sure if there was a function for this or not. thanks!