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Algebra 9 Online
OpenStudy (anonymous):

Prove this identity: (sec x+1)^2-(sec x-1)^2=4tanx/sinx

OpenStudy (mertsj):

Square both binomials, remove the parentheses and collect the like terms.

OpenStudy (anonymous):

I did that. Got 4secx=4tanx/sinx What do you do from here?

OpenStudy (mertsj):

Change 4secx to 4/cosx. Now go to the right side. Replace tan with sin/cos and simplify the complex fraction.

OpenStudy (anonymous):

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