Question #396f2
1 Answer
Feb 6, 2018
It isn't.
Explanation:
Let's find a derivative of
Simplifying:
If we graph our derivative:
graph{-sinx-cosx+(1/cosx)^2 [-5, 5, -2, 8]}
And compare it to
graph{(sec(x+22/7))^2 [-5, 5, -2, 8]}
We clearly see they cannot be the same, so the argument is false.