document.write( "Question 1140761: Sinusoidal Functions
\n" ); document.write( "Without graphing, determine the amplitude, period, equation of the axis, phase shift, domain, and range of the function y=20 cos(9x-81°)-2''.
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Algebra.Com's Answer #761293 by t0hierry(194)\"\" \"About 
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The Amplitude is 20.
\n" ); document.write( "When 9x = 81 + 2 pi
\n" ); document.write( "then x = 9 + 2pi/9
\n" ); document.write( "and the cosine repeats itself, so
\n" ); document.write( "the period = 2 pi/9
\n" ); document.write( "The phase shift is 81
\n" ); document.write( "Domain is infinity
\n" ); document.write( "Range is y = [-22 , 18]
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