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sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)...

`sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+ .....+sin^(2)85^(@)+sin^(2)90^(@)` is equal to

A

7

B

8

C

9

D

`9 ( 1)/( 2) `

Text Solution

Verified by Experts

The correct Answer is:
D
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