Mathematics - 20 October 2007

a. x(sqrt x^2 + 1) / x^2 + 1
b. x(sqrt x^2 + 1)
c. (sqrt x^2 - 1) / x^2 - 1
d. (sqrt x^2 + 1) / x^2 + 1

2007-10-20 01:22:50 · 2 answers · asked by hana 1

tan(π/4+θ) - tan(π/4-θ) = 2tan2θ

I keep getting stuck on this one.
I was trying to use the double angle formula but messed up.

2007-10-20 00:19:24 · 3 answers · asked by Anonymous