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UPSC NDA I 2012 Mathematics Paper
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© examsnet.com
Question : 42
Total: 120
What is
s
i
n
A
cos
A
tan
A
+
cos
A
sin
A
cot
A
equal to?
s
i
n
A
cos
A
tan
A
1
Validate
Solution:
s
i
n
A
cos
A
⋅
s
i
n
A
cos
A
+
cos
A
s
i
n
A
cos
A
s
i
n
A
s
i
n
2
A
+
cos
2
A
=
1
© examsnet.com
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