Try another version of this question Get help: Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Evaluate the limit using L'Hôpital's rule.
` lim_( x rarr pi/2 ) \ 6 cos(-5 x) sec (7 x) `
Enter DNE for Does Not Exist, oo for Infinity `-30/7`