SOLUTION: Which identity would be the next best step for solving the following expression? Expression & identities: https://s24.postimg.org/gxkb2gjlh/best_next_step_6.png Thanks.

Algebra ->  Expressions-with-variables -> SOLUTION: Which identity would be the next best step for solving the following expression? Expression & identities: https://s24.postimg.org/gxkb2gjlh/best_next_step_6.png Thanks.      Log On


   

Question 1063189: Which identity would be the next best step for solving the following expression?
Expression & identities: https://s24.postimg.org/gxkb2gjlh/best_next_step_6.png
Thanks.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
D. If one considers that sec^2 x=tan^2 x+1
then sec^2 x-1=tan^2 x. Substitute tan^2 x for sec^2 x-1
Once you have that in place, you can multiply through to the answer on the right.