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Mathematics 15 Online
OpenStudy (anonymous):

how do i square 21/29?

OpenStudy (jackellyn):

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

OpenStudy (anonymous):

441/851

OpenStudy (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?

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