Question

Sin -30

Answer 1

sine is a odd function sin (-x) = -sin x

Answer 2

So, find sin(30) and then multiply it by -1

Answer 3

one method to find sin 30 is to make a triangle with a 30° angle

Answer 4

starting with an equilateral triangle (all angles are 60°) and side lengths 2

then bisecting it



we get a triangle with 30°, 60°, 90°, one side is of length 2, the other side length of length 1

Answer 5

then use the definition of sine, sin x = opposite / hypotenuse
sin 30 = /
=