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 ratio 1:2:4:5

Question : 55 of 100

Marks: +1, -0

What is sec2D−tan2D equal to?

1∕2
2∕3
1
None of the above

Validate

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