Question

sin 20 + sin 40 - sin 80​

Answer 1

welcome to the concept of trigonometry.

formula used :

sinx-siny= 2cos{(x+y)÷2 }sin {(x-y)÷2)

$\sin(20) + \sin(40) - \sin(80)$

=2cos 60 sin (-20) + sin20

=sin20[ -2cos60 +1] ( cos60=1/2)

=sin20(0)

=0

i hope it help you

Answer 2

Answer:

The answer is 0

Step-by-step explanation:

The answer u need is there in the photo.

Hope it helps u☺️