1.

`lim_(xrarr(pi//4))(sec^2x-2)/(tanx-1)` isA. 3B. 1C. 0D. 2

Answer» Correct Answer - d
Given, `lim_(xto(pi//4))(sec^(x)-2)/(tanx-1)`
`=lim_(xto(pi//4))(1+tan^(2)x-2)/(tanx-1)=lim_(xto(pi//4))(tan^(2)x-1)/(tanx-1)` = `=lim_(xto(pi//4))(tanx+1)` =2


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