Question

Question #abce1

Answer 1

`sin(-3/4pi)=-sin(3/4pi)=-sin(pi-pi/4)=-sin (pi/4)=-1/sqrt 2`.-

Explanation:

`pi` radian `= 180^o`

Here, the conversion factor is `pi/180.`.

So, `-135^o=-135/180pi=-3/4pi` radian.