SOLUTION: (Tan^2)/secx))= secx-cosx I seen in a video of a teacher transforming tan^2x into (sec^2x-1)/secx)) but how is that possible 1+tan^2x=sec^2x? How did the 1 go negative? How do y

Question 929272: (Tan^2)/secx))= secx-cosx
I seen in a video of a teacher transforming tan^2x into (sec^2x-1)/secx)) but how is that possible 1+tan^2x=sec^2x? How did the 1 go negative? How do you solve it with tanx=sinx/cosx as well? Sorry im asking for too much.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
(Tan^2)/secx))= secx-cosx
I seen in a video of a teacher transforming tan^2x into (sec^2x-1)/secx)) but how is that possible 1+tan^2x=sec^2x? How did the 1 go negative? How do you solve it with tanx=sinx/cosx as well? Sorry im asking for too much.
***

or
1+tan^2(x)=sec^2(x)
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