Posted by **Anonymous** on Friday, February 22, 2013 at 7:53pm.

(sec^2x-1)(csc^2x-1)=1 prove the following identity

ive been stuck on this for hours please help

- trig -
**Steve**, Saturday, February 23, 2013 at 4:58am
sec^2(x)-1 = tan^2(x)

csc^2(x)-1 = cot^2(x)

since cot = 1/tan, it follows immediately

- trig -
**Holly**, Tuesday, March 12, 2013 at 7:01pm
A math tutor told me to FOIL it. This is just a hint, or starting point because I don't know for sure.

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