Function triALLrL

triALLrL(
    a31: number,
    l1: number,
    l2: number,
    checkLevel?: ECheck,
): [number, number, string]
Calculate the length l3 of a triangle from a31, l1 and l2
Parameters
- a31: number
  the angle between l3 and l1 in radian
- l1: number
  the first length of the triangle
- l2: number
  the second length of the triangle
- checkLevel: ECheck = ECheck.eError
  the level of check
Returns [number, number, string]
the two possible lengths of l3 of the triangle. l3 can be positive or negative + string-for-log
- Defined in index.ts:276