Math problem . I don't have my calculator here .

[rodm1]

Right triangle calculator

Find missing leg, angle, hypotenuse and area of a right triangle.

www.mathportal.org

 

[Jeff.64]

Looking at my reply now, it could me more clear.

dropoff_amount = 1/2 horizon_distance x horizon_distance / Earth_radius

or get rid of the 1/2

dropoff_amount = horizon_distance x horizon_distance / Earth_diameter

if all distances are in miles, multiply answer (dropoff_amount) by 5280 ft/mi to get feet.

Hope This Helps,
Jeff

 

[GeneT45]

My phones have all had a scientific calculator. It is an option you can select in the calculator app.

Years ago HP released the firmware to their excellent scientific (and financial) calculators. You can readily download emulators, running the original firmware core, to any phone - just search by calc type. (e.g. "HP48")

For the more programming inclined, there's Frink...

GsT

 

[mmcmdl]

Wonder if a TI-30 would load onto a phone ? That's what I've used for 55 years .

 

[Jeff.64]

Wonder if a TI-30 would load onto a phone ? That's what I've used for 55 years .

I wore out 2 TI55's from the late 70's to the early 80's and around 83 I bought an HP15c. Still use it today. Quality stuff. The 4 key sometimes bounces so I have to be careful not to enter 44 when I want 4. However, I used the PC calculator for this.

Anyway, since you have a square root available, here is another solution to your math problem:

 

[GeneT45]

Fun fact: the keys on those old HP calculators had the markings *molded in* - you could literally sand the key to half thickness and the markings would still show. TI not so much...

GsT