View Single Post
  #13  
Old 11-12-2010, 03:39 AM
jt20 jt20 is offline
Registered Hack
 
Join Date: Mar 2008
Posts: 4,642
just updating from our PM; I didn't take into account the lack of calculator:

Quote:
I don't know how you would use pythg... please enlighten me.

Given the table, I would use the identity of tan.

tan(15.9)=sin(15.9)/cos(15.9)

you want to solve for x so: 300/x = sin(15.9)/cos(15.9)

then, the values for sin and cos are on the table.

then use pythg once you have x: x^2 + 300^2 = hyp^2

hyp = distance to the boat.

you could make a really close estimate at that point. the number I posted was from me using a calculator.

x=1046.4 hyp= 1088.6 using 16* on the table
thank cmac for the correction!

Last edited by jt20; 11-12-2010 at 04:39 AM.
Reply With Quote