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`lim_( x to (pi/(2)) (tan2x)/(x-(pi)/(2))` |
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Answer» `underset(xrarr(pi)/(2))"lim"(tan2x)/(x-(pi)/(2))` `=underset(yrarr0)(tan2((pi)/(2)+y))/((pi)/(2)+y)-(pi)/(2))` `=underset(Xrarr0)"lim"(tan(pi+2y))/(y)=underset(yrarr0)"lim"(2tan2y)/(2y)` `=2xx1=2(because underset(thetararr0)"lim"(tan theta)/(theta)=1` |
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