Changing the x-axel to Pi/2,Pi....., is it possible?

Questions
1

If you say

Plot[Sin[x],{x,0,2Pi}]

Can you plot show Pi as a scalle, 1 PI,2Pi…etc?

2

Just type

Plot[Sin[x], {x, 0, 2 Pi}, Ticks -> {{0, \[Pi], 2 \[Pi]}, Automatic}]