document.write( "Question 419319: How do you know what the period is when graphing sins and cos?
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Algebra.Com's Answer #293267 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( " cos(x) has a period of 2pi and and amplitude of 1. (Green)
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document.write( " y = acos(bx) has a period of 2pi/b and an amplitude of a 
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document.write( " y = cos(4x) has a period of 2pi/4 or pi/2 (Blue)
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document.write( "Note: the Green line extending over the period of 2pi for cos(x)
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document.write( "2*(3.14)=6.28  Green Line extends from (0,1) to (6.28,1)
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document.write( "graph ofcos(x)
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document.write( "graph of cos(4x) Period of pi/2 = 1.57. Blue Line extends from (0,1) to (1.57,1)
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