In a right angled \( \triangle A B C, \sin ^{2} A+\sin ^{2} B+\sin ...

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In a right angled \( \triangle A B C, \sin ^{2} A+\sin ^{2} B+\sin ^{2} C \) is equal to
(A) 0
(B) 1
P W
(C) \( -1 \)
(D) None of these.
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