Question

sin^2 5° +sin^2 10° + sin^2 15° + ...... + sin^2 90º =​

Answer 1

Answer:

18.5 or 37/2

Step-by-step explanation:

sin^2 5° = cos^2 85°

sin^2 85° + cos^2 85° = 1

17*1 + sin^2 45° + sin^2 90° = 17 + 1/2 + 1 = 37/2