Friday
May 24, 2013

# Posts by Hayden

Total # Posts: 102

precalc and trig
cos^2 (a+x) -sin^2 a=cos x * cos(2a+x)

Precalc and trig
how does cos^2x(cos^2a – sin^2a) - 2sinacosasinx = cos^2x(cos^2a – sin^2a) – 2cosxcosasinxsina

Precalc and trig
thanks! i accidentally posted this twice

Precalc and trig
cos^2 (x+a)-sin^2(a)= (cos x)(cos (2a+x)) prove using only side i worked on the left side...

spanish help quick!!! i have to submit my answers!
so we are learning the pred. v imperfect but i dont know when to use which i sort of have an idea like habitual inturrupting etcetc but i get them all wrong El lunes pasado yo _tuvé__ una discusión con un compañero de clase. La discusión __comenzaba...

AP Spanish
so we are learning the pred. v imperfect but i dont know when to use which i sort of have an idea like habitual inturrupting etcetc but i get them all wrong El lunes pasado yo _tuvé__ una discusión con un compañero de clase. La discusión __comenzaba...

trig
find sin 2x if tan x=2 cosx>0

Trig
given sin(4x)=5/13 in Q II find Tan(2x) and cos(2x)