UPSC CAPF AC 2019 Paper
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Question : 77 of 125
Marks:
+1,
-0
Let x 2 + y 2 = 1 ;
u 2 + v 2 = 1
x u + y v = 0
1.x 2 + u 2 = 1
2.y 2 + v 2 = 1
3.x y + u v = 0
Which of the above is/are true ?
1.
2.
3.
Which of the above is/are true ?
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