document.write( "Question 1152666: If sin^2 (𝛑/9) + sin^2 (2𝛑/9) + sin^2 (3𝛑/9) + sin^2 (4𝛑/9) = 9/4,
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Algebra.Com's Answer #774723 by Edwin McCravy(20067) $\"\"$ $\"About$

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