On Aug 21, 12:45*pm, Chris L Peterson wrote:
On Sat, 20 Aug 2011 20:35:04 -0700 (PDT), Ron Cuaz

wrote:
tangent of (12.7arcmin/2) is 0.1113 and multiply it by 2 * 5 is
1.113m. I wonder how you got 0.018 m?

tan(12.7 arcmin / 2) = tan(0.1058 deg) = 0.0018. Times 2 times 5
meters is 0.018 m.

but 1 radian is equal to 57.2957795131 degree
so converting 12.7/2 or 6.35/ 57.2957795131 is 0.1108284 degrees

but in your case, you seem to use 1 radian = 60 degree to arrive at
6.35/60 = 0.105833

Why did you use 60 degree per radian? is there a particular
significant like maybe some relativistic correction? Just curious why
you need to use 60 instead of 57 since typing 2 numbers in calculator
requires same effort. Thanks.