UPSC 2017 CDS II Math Paper

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Question : 48 of 100

Marks: +1, -0

If sin‌θ=

m2−n2

m2+n2

and 0<θ<

π

2

, then what is the value of cos θ ?

[2017 CDS-II]

2mn
m2+n2
2mn
m2−n2
m2+n2
2mn
m2−n2
2mn

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