Question

lim x-0 1-cosmx/1-cosnx

Answer 1

Final. Answer :
$\frac{ {m}^{2} }{ {n}^{2} }$
Steps :
1) Given Intedeterminate firm of of 0/0 .
2) Use L - Hospital Rule, then
use standard lim x tends to x sin x /x = 1 .

For Calculation see pic