UPSC NDA 2 2019 Mathematics Solved Paper

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Directions (Q. Nos. 86 to 88): Read the following information and answer the three items that follow:
Consider the function f(x)=g(x)+h(x) where g(x)=sin(
x
4
)
and h(x)=cos(
4x
5
)
[NDA II 2019]
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