Which of the following is a four element entity consisting of a scalar and a vector and is used to describe strapdown system rotation?

Which of the following is a four element entity consisting of a scalar and a vector and is used to describe strapdown system rotation? Correct Answer Quaternion

Describing rotation motion in the strapdown system employ more than the minimum three parameters. A quaternion is a four element entity ting of a scalar part and a vector part. It defines the instantaneous axis of rotation.
Bissoy MCQ

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