1.

Let f be function f(x)=cosx-(1-(x^(2))/(2)) . Then

Answer»

f(X) is an INCREASING functions in `(0,OO)`
f(x) is an DECREASING function in `(-oo,oo)`
f(x) is an increasing function in `(-oo,oo)`
f(x) is an decreasing function in `(-oo,0)`

Answer :A::D


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