## anonymous one year ago how do i square 21/29?

1. jackellyn

$(\frac{ 21 }{ 29})^{2} = \frac{ 21^{2} }{ 29^{2} }=?$

2. anonymous

441/851

3. anonymous

If sin θ = , use the Pythagorean Identity to find cos θ. is my question. so i use sin^2+cos^2=1 right? so then i take 1 and subtract 441/841. i get 400/841. now what?