Question

sin 90+theta

Answer 1

This...
\[\Large \sin(90^o + \theta)\]

Answer 2

sin (90 + Ө) = sin 90 cos Ө + cos 90 sin Ө
sin (90 + Ө) = cos Ө

sin (90 - Ө) = sin 90 cos Ө - cos 90 sin Ө
sin (90 - Ө) = cos Ө

Answer 3

It's simple... you use this formula...
\[\large \sin(\alpha+\beta) = \sin(\alpha)\cos(\beta) + \cos(\alpha)\sin(\beta)\]
coupled with the facts that
\[\large \sin(90^o) = 1\]\[\large \cos(90^o) = 0\]

And @allie_bear22
you type fast :)

Answer 4

thnx lol