HP 35s Scientific manual 8, 8Integrating Equations

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.

8-8Integrating Equations