Question

Point A is found at (-3, -3). Find the sin at that point.

A. √2/2

B. -√2/2

C. √3/3

D. -√3/3

Answer 1

B. -√2/2.

Explanation:

This is in the third quadrant so the sine will be negative.

The hypotenuse = √ [( -3)^2 + (-3)^2]

= √18 = 3√2.

Therefore the sine = -3 / 3√2.

= -1 / √2

= -√2/2..