Question

be sin 1875 का मान होगा
hoga​

Answer 1

sin (300+1515)

=sin (1515)

=sin(360+1155)

=sin(1155)

=sin (360+795)

=sin (795)

=sin (360+435)

=sin (435)

=sin(360+75)

=sin (75)

=sin (30+45)

=sin 30 cos 45 +cos 45 sin 30

= (1/2) (1/√2) + (1/√2) (√2/2)

= (1+√3) / (2/√2)