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sin^(2) (3^(@))+sin^(2) (6^(@))+sin^(2) ...

`sin^(2) (3^(@))+sin^(2) (6^(@))+sin^(2) (9^(@))+...+sin^(2) (84^(@))+sin^(2) (87^(@))+sin^(2) (90^(@))=`

A

`31/2`

B

`39/2`

C

`59/2`

D

36

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The correct Answer is:
A
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