Lim x- 4 sec 2 x-2 tanx-1

lim_x→π41+tan^2x 2tanx 1 where ^2x=1+tan^2x =lim_x→π4tan^2x 1tanx 1 =lim_x→π4(tanx 1)(tanx+1)tanx 1 =lim_x→π4(tanx+1) =tanπ4+1 ...

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Substitution Method to Remove Indeterminate Form

lim x→π 4 sec...

Question

${lim}_{x \to \frac{π}{4}} \frac{{s e c}^{2} x - 2}{t a n x - 1}$

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f (x) = \frac{s e c^{2} x - t a n x}{s e c^{2} x + t a n x} - \frac{π}{2} < x < \frac{π}{2}

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