Trig algorithms on HP RPN?

[Thomas Klemm]

Your program illustrates my point very nicely: Run program B in DEG mode to use program A to calculate \(\tan(x)\) in degrees.

But then we end up with constants like these:

45.00000000
5.710593137
0.572938698
0.057295760
0.005729578
0.000572958
…

And ROM was a scarce resource.

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(12-01-2024 05:17 PM)Gerson W. Barbosa Wrote:  I cannot find a reference to the original TI program this one is based upon.

Initially I considered the HP-15C for this article: Exploring the CORDIC algorithm with the WP-34S
But I'm not sure if that would have worked as well because you can't store complex numbers in registers.
And the WP-34C provides INC and decimal shift which turned out to be useful.

But you can still follow the example on the HP-15C manually:

1 ENTER 0.1 I
ENTER
ENTER
3 ENTER 4 I

3.000000000

×

2.600000000

×

2.170000000

×

1.714000000

×

1.236300000

×

0.741460000

×

0.234257000

×

-0.280360600