**PURPOSE**- Find included angle (in degrees) between two vectors. Example.

**SEE ALSO****VO EPT**[Vector Operation - Euler angle point rotation]

**USAGE**- .OPERATION: VO IA [inc-ang]

- [This operation can return one optional register variable:
Variable Example Receives First [inc-ang] Included angle .FIRST VECTOR - X, Y & Z: 1, 1, 1

[Enter X, Y, & Z components of first vector.].SECOND VECTOR - X, Y & Z: 1, -1, 0

[Enter X, Y, & Z components of second vector.

**NOTES**

- Implemented by A. Leith.

**SUBROUTINES**- VOIA

**CALLER**- DRIV1

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