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View Full Version : prove ((sec(x)-csc(x))/((sec(x)+cot(x)) is equal to ((tan(x)-1)/(tan(x)+1)


KTC143
Mar 17, 2012, 07:11 PM
Prove this trigonometric identity... I dare you!!

KTC143
Mar 17, 2012, 07:14 PM
Please help!. alabama high school homework... trigonometric identity

Phabio
Mar 17, 2012, 08:00 PM
Change both the sides of the equation to sines and cosines and you should be able to find it out from their

ebaines
Mar 19, 2012, 06:19 AM
The identity is incorrect, so it can't be proven. I suspect that the identity you are trying to prove is actually this:


\frac {sec(x)-csc(x)} {sec(x)+csc(x)} = \frac {\tan(x) -1}{\tan(x) + 1}


As Phabio said - convert the functions to sine and cosine equivalents and work from there.