How do you prove (1-sec^2x) / (secx - 1) = secx + 1 1−sec2xsecx−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)+11−sec2(π3)sec(π3)−1≠sec(π3)+1
(1-2^2)/(2-1)!=2+11−222−1≠2+1
(-3)/1!=3−31≠3
-3!=3−3≠3
