document.write( "Question 362521: the voltage E in an electrical circuit is given by E=6.5cos50pi t, where t is time measured in seconds. Find the period show work \n" ); document.write( "
Algebra.Com's Answer #258442 by Fombitz(32388)\"\" \"About 
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\"P=%282%2Api%29%2F%2850%2Api%29=1%2F25\"sec
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\n" ); document.write( "Here is the graph from \"t=-0.1\" to \"t=0.1\" which would be \"5\" periods.
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\n" ); document.write( "\"graph%28300%2C300%2C-.1%2C.1%2C-7%2C7%2C6.5cos%2850%2Api%2Ax%29%29\"
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