How do you prove (1-sec^2x) / (secx - 1) = secx + 1 ?
1 Answer
Mar 20, 2016
This is not a valid identity.
Explanation:
We can show this is an invalid identity by plugging in
(1-sec^2(pi/3))/(sec(pi/3)-1)!=sec(pi/3)+1
(1-2^2)/(2-1)!=2+1
(-3)/1!=3
-3!=3