Question

70.
Value of sin?(5° + 0) + sin?(10° + 0) + ...+ sin?(45° + 0)
+ sin2(45° - 0) + sin?(50° - 0) + sin?(55° - 0) + ...
+ sin?(85° – 0) is
(1) 15
(2) 10
(3) 9
(4) 5​

Answer 1

Answer:

15

15 because it is the most common angle to solve values