exact trig values sin mnemonic

How do you remember all the following sin values:

To remember all the values of the key angles for sin, use the following mnemonic or hand trick:

First, assign all the fingers on one hand from zero to ninety with the thumb sticking up, as follows: 

use the formula: 

`sin 0° =``(√0)/2``=0`

`sin 30° =``(√1)/2``=1/2`

`sin 45° =``(√2)/2`

`sin 60° =``(√3)/2`

`sin 90° =``(√4)/2``=2/2``=1`