Question

lim x → π/4 sec^2x -2/tanx-1

Answer 1

Answer:

lim x->π/4 (sec²x-2)/(tanx-1)

lim x->π/4 (sec²x - 1 -1 )/(tanx-1)

lim x->π/4. (tan²x -1)/(tanx-1)

limx->π/4. (tanx-1)(tanx+1)/(tanx-1)

lim x->π/4 (tanx+1)

put limit

(tan(π/4) + 1)

1+1

=2