write these angle in first row except first box. by these angle we can determine value of other angle.
we will determine all angle value of sin function as shown in the above pic. we will determine sin value on 0, 30, 45, 60, 90 angle. for determine the value of sin angle we will divide of 0 to 4 by 4.
it means the value of sin on 0 degree is 0.
it means the value of sin on 30 degree is 1/2.
it means the value of sin on 45 degree is 1/2.
it means the value of sin on 60 degree is 3/2.
it means the value of sin on 90 degree is 