I've been stuck as to how to simplify this: [(cosxcotx)/(secx+tanx)] + (sinx)/(sex-tanx)]y
Apparently it simplifies to sinx, but i have no idea how they got there. Been working on this for about a half an hour now and i keep getting stuck, help?
If you mean this:
then no - it does not simpify to .
There is an extra close bracket symbol ']' in your original post, and an extraneous 'y' charcter after it in the body of the post, so perhaps I am not interpreting your formula correctly.
Yeah, I wrestled with this one and couldn't make it reduce to sin(x). Just to confirm, I fed it through Mathematica and Mathematica waived a little white flag over it too. So either you copied it wrong or there's a misprint in your book.
I've learned when trying to help people with trig identities - if I can't work it out in 2 minutes or less then I put it in excel and see if it works for a value like x = 0.1. It saves a lot of wasted time...