Question

Why is sin(20) = sin(160) = -sin(200) = -sin(340)?

Answer 1

sin 20 is the same as sin 60 because 180-60=20. sin 20 is the same as -sin200 because 200-180=20

sin 340 is the same as sin 20 because 360-340=20. So all four of these connect and they all equal 20. Also, they all equal .3420 (rounded)

Explanation:

Answer 2

All 4 equal the same value.

sin(20) = 0.3420201433

sin(160) = 0.3420201433

-sin(200) = 0.3420201433

-sin(340) = 0.3420201433