Solve the problem.The power dissipated in an electric circuit is given by the expression 
where R is the resistance of the circuit and I is the current through the circuit. For a sinusoidal alternating current, the current might be represented by the relation 
where A is the amplitude, f is the frequency, and t is time. Write an expression for P involving the sine function, and use a fundamental identity to write P in terms of the cosine function.
A. P = RA sin2(2?ft) ; P = RA - RA cos2(2?ft)
B. P = RA2 sin2(2?ft) ; P = RA2 - RA2 cos2(2?ft)
C. P = RA2 sin2(2?ft) ; P = - RA2 cos2(2?ft)
D. P = RA sin2(2?ft) ; P = RA - cos2(2?ft)
Answer: B
Mathematics
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B. 
C. - 
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Find the first four nonzero terms of the Maclaurin expansion of the given function.f(x) = ex sin x
A. 1 + x2 + 
x3 + 
x5 + ...
B. 1 + x + 
x2 - 
x6 - ...
C. 1 + 
x + 
x3 - 
x5 - ...
D. x + x2 + 
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x5 - ...
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Data that has been sorted into a frequency distribution can then be graphed easily using a
A. line graph B. histogram C. frequency polygon D. bar graph
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A. 3 ? 3 B. 3 ? 29 C. 3 ? 3 ? 29 D. 3 ? 27
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