In a right angled \( \triangle A B C, \sin ^{2} A+\sin ^{2} B+\sin ^{2} C \) is equal to (A) 0 (...

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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
\( \mathrm{P} \)
(C) -1
(D) None of these.
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