Question

Show that sin 28 degrees =cos 62 degrees

Answer 1

LHS = sin 28°
RHS = cos 62°
Now, we know that cos theta = sin (90-theta)

So,
cos 62° = sin (90-62)°
= sin 28°

Therefore
LHS = RHS
Hence, proved.

Answer 2

sin28=cos 62
sin28=sin(90-62)
sin28=sin28
L.H.S=R.H.S
Hence proved