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Using the relation 2(1−cosx)<x^2 ,x=0 or...

Using the relation `2(1−cosx)`<`x^2` ,`x=0` or prove that `sin(tanx)≥x,∀ϵ[0,π/4]`

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  3. Using the relation 2(1−cosx)<x^2 ,x=0 or prove that sin(tanx)≥x,∀ϵ[0,...

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