Question

find the value of sin(765*).​

Answer 1

765=720+45

sin(765)=sin(720+45)=sin(2∗360+45)

Now the period of sin x is 360 degrees. After every integral multiples of 360 degree it will repeat its value.

So sin(2∗360+45)=sin45=(1/2).5

Hope that was useful.