Wow! These things are boogers! :eek: any way to make these things easier?

prove this trigonomteric identities I did soooo many trial and errors can't get it . tan(x-y) + tan(y-z) = (sec^2y) (tanx-tanz) / (1 + tanxtany)(1+tanytanz) thank you so much in advance

1) Solver for x: log7(x+4) + log7(x-2)=1

I understand that not all special operators work together in Google advanced searching... How can I do a Google search for webpages containing a word in the url AND a term on the page? For example, at stgabrielradio.com homepage is the term "monsignor lane". ... so if I were searching for...

Yult Company owns 25% of the common stock of Dent Co. and uses the equity method to account for the investment. During 2002, Dent reported income of $220,000 and paid dividends of $80,000. There is no amortization associated with the investment. During 2002, how much income should Yult recognize...