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lim(xrarr0) ("cosec "x-cotx)...

`lim_(xrarr0) ("cosec "x-cotx)`

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`underset(Xrarr0)"lim"(cosec-cotx) (oo-oo)`
`=underset(xrarr0)"lim"(cosec-cotx)`
`=underset(xrarr0)((1)/(sinx)-(cosx)/(sinx))`
`=underset(xrarr0)"lim"(1-cosx)/(sinx)`
`=underset(xrarr0)"lim "(2ins^(2)(x)/(2))/(2sin(x)/(2)cos(s)/(2))`
`= underset(Xrarr0)"lim" tan(X)/(2)=tan0=0`
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