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sin^(2)5^(@) + sin^(2)25^(@) + sin^(2)45...

`sin^(2)5^(@) + sin^(2)25^(@) + sin^(2)45^(@) + sin^(2) 65^(@) + sin^(2) 85^(@)` is equal to:

A

1.5

B

2

C

2.5

D

3

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