Question

The value of sin² 5° + sin² 10° + sin² 15° + .... + sin² 90° is (1) 8 (2) 9-1/
2 (3) 9 (4) 10​

Answer 1

Answer:

sin ² 5 + sín² 10+ sin ²15+. + sin ²

sin (90-0) = (OSO sin² (90-0)

sin ²0 + los ²0 21

ALI A

So there are 8 cases where sin ²0 + Los ²0² |

sin ²5 + Los ²5 =

1

Sin ²10 + 60570 = 1

8 + sin²³² 45 + sin ² go

19

2