HP 30b Programming

[lrdheat]

Here is my program to find a root of (((x^3)*COS (X/2))+1/2)*SRT(4-X^2):
I used Prgm #1 slot… and am in RPN and RAD mode:

RCL 1 (guess for root of interest)
3
Y^X
RCL 1
2
/
COS
*
2
1/X
+
RCL 1
X^2
+/-
4
+
SQRT
*
RCL 2
-
STOP

Using a guess of -1 for the root closest to that value (store the guess in storage 1), and searching for a root where f(x)=0, store 0 in storage 2.

Hold the blue shift key and the solve key simultaneously (solve is the math menu key) to produce the word SOLVE. Enter 1 to solve for variable 1. Instantly, the correct solution of -.816729997302 appears!