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What is the value of the sin^(2) 6^(@) +...

What is the value of the `sin^(2) 6^(@) + sin^(2) 12^(@) + sin^(2) 18^(@) + "……" + sin^(2) 84^(@) + sin^(2) 90^(@)` ?

A

A)1

B

B)2

C

C)4

D

D)8

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