CDS 2013 PYQ with Answer — What is sec²D − tan²D equal to?

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Atlas Essay Optional Vistaar

UPSC CDSCombined Defence Services Overview

Test Series

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Overview Daily Quiz Mock Tests All-India PYQs Practice

CDS 2013 · Elementary Mathematics (CDS-I)Q55

Back to the full 2013 paper

2013 · Q55

What is sec²D − tan²D equal to?

Elementary MathematicsTrigonometry

A1/2
B2/3
C1
DNone of the above

Explanation

sec²−tan²=1 identically. Answer C.

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