Goal Seeking via Excel


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Can someone help explain these two problems for me using goal seek? I am completely stumped and I won't see my professor for a couple more days to ask them. Thank you!

5. Determine the two real roots between x= -5 and x=5 for X + COSX=1+SINX. Note: To find more than one root, you must do goal seek more than one time, each time with a different guess.


6. In order to determine the temperature distribution within a one-dimensional solid, engineers must often solve the equation: XtanX=c, where c is a known positive constant. Assuming a value of c=2, find the three smallest positive roots of XtanX=2.
 

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