You have to use L'Hospital Rule. So you take the derivative of the top then you take the derivative of the bottom.
1/2 × (lim x→0 (sec²x/1))
Substitute in the x-value
1/2 × (lim x→0 (sec²(0)/1))
(lim x→0 (sec²(0)/1) = 1
1/2 × 1
1/2
B. How to solve operations with fractions and decimals
Hope this helps :)
A is correct...
hope helps