1.

Evaluate the following limits: `lim_(xrarr(pi)/(2))((pi)/(2)-x)tanx`

Answer» Correct Answer - 1
Put `((pi)/(2)-x)="y so that when"xto(pi)/(2)then y to0.`
`therefore` given limit `=lim_(y to0)y tan((pi)/(2)-y)=lim_(y to0)y cot =lim_(yto0)(y)/(tany)=1.`


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