UPSC 2013 CDS 1 Math Paper
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Directions : Consider teh folowing for the next four (04) questions that folllow:
The angles A, B, C, D of the quadrilateral ABCD are in the ratio1 : 2 : 4 : 5
The angles A, B, C, D of the quadrilateral ABCD are in the ratio
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Question : 53 of 100
Marks:
+1,
-0
What is cosec ( C − D + B )
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