Select and write the correct answer from...

Select and write the correct answer from the given alternatives in each of the following:Thevalue of `sin^2(5^@)+sin^2(10^@)+sin^2(15^@)+………..+sin^2(85^@)+ sin^2(90^@)` is equal to

A

1) 7

B

2) 8

C

3) 9

D

4) `9 1/2`

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