Spherical law of cosines?

  • Thread starter moonman239
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Let's say I want to use the spherical law of cosines to determine the distance between two points. How do I calculate the error in the approximation (ignoring ellipsoidal effects)?
 

Answers and Replies

  • #2
Is the law of cosines an approximation for a sphere?

If you have an uncertainty in the position of each point and you want the uncertainty in the distance - you could do some horrible differentiation of the formula, OR you could just re-calcuate the distance for one position +/- the error and use that
 

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