SOLUTION: 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

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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
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
P=%282%2Api%29%2F%2850%2Api%29=1%2F25sec
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Here is the graph from t=-0.1 to t=0.1 which would be 5 periods.
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graph%28300%2C300%2C-.1%2C.1%2C-7%2C7%2C6.5cos%2850%2Api%2Ax%29%29