Prove that if
Last edited by tony123 (2008-11-22 22:30:46)
Last edited by Daniel123 (2008-11-23 11:27:22)
I have troublr with that too.
i need help!
I know very well this expression.I am studying this function in school.I like your work.Thanks for share this information.
squarring bot the equation then subtrac
now squarring above equation then add
now put the valu of cos(x+y) in (o)