Keys:

Display:

Description:

8



Specifies accuracy to four decimal

()

 

places. The uncertainty from the

 

 

last example is still in the display.

￿



Rolls down the limits of integration

 



from the Z– and T–registers into

 

 

the X– and Y–registers.



Displays the current equation.

X



Calculates the result.

 

∫

 

 



 



Note that the uncertainty is about

 

 

1/100 as large as the uncertainty

 

 

of the SCI 2 result calculated

 

 

previously.

8()

Restores FIX 4 format.

9()



Restores Degrees mode.

This uncertainty indicates that the result might be correct to only three decimal places. In reality, this result is accurate to seven decimal places when compared with the actual value of this integral. Since the uncertainty of a result is calculated conservatively, the calculator's approximation in most cases is more accurate than its uncertainty indicates.

For More Information

This chapter gives you instructions for using integration in the HP 35s over a wide range of applications. Appendix E contains more detailed information about how the algorithm for integration works, conditions that could cause incorrect results and conditions that prolong calculation time, and obtaining the current approximation to an integral.