9. which property is illustrated by 6 x 5 = 5 x 6?

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

We just started the introduction into circles and i have no idea how to do this.

If the value of cos330°is√3/2 then find cos 165°.