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Unformatted text preview: of change of the temperature T ( t ) of a air conditioned house with external temperature A ( t ) is proportional to the dierence AT . That is, dT t = k ( AT ) , where k is positive constant. Now, suppose A ( t ) = 8010cos( t ) nd the general solution. Solution Since we want to use Mathcad to nd the antiderivative for us, the rst thing is to nd how to get the Greek letter . To get , rst bring the math tool bar from the View menu Figure 3. Math Toolbar...
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 Spring '11
 Dr.Han

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