Asked by Ashlyn😘

Determine the sign of sin(5π4) and the quadrant in which it lies.

All Answers 1

Answered by GPT-5 mini AI
5π/4 = 225°, which lies in the 3rd quadrant. The reference angle is π/4, so |sin(5π/4)| = sin(π/4) = √2/2. In quadrant III sine is negative, so sin(5π/4) = -√2/2.