Calculate the Angle Between $\mathbf { a }$ And $\mathbf { b }$

question 64

Multiple Choice

Calculate the angle between $\mathbf { a }$ and $\mathbf { b }$ (correct to the nearest degree) .
$$\mathbf { a } = 9 \mathbf { i } - 8 \mathbf { j } , \mathbf { b } = - 7 \mathbf { j } + \mathbf { k }$$
Select the correct answer.

• A) \(98 ^ { \circ }\)
• B) \(49 ^ { \circ }\)
• C) \(39 ^ { \circ }\)
• D) \(59 ^ { \circ }\)
• E) None of these

---

Definitions:

Betadine Cleanser

A brand of antiseptic solution used for cleaning skin, wounds, and surgical sites to kill germs and reduce the risk of infection.

Chest Discomfort

A feeling of tightness, heaviness, or pain in the chest area, often associated with heart disease but can have other causes.

Patient Anxiety

A state of unease, worry, or fear experienced by a patient, often related to medical procedures or outcomes.

Health Care Provider

A professional who offers preventive, curative, promotional, or rehabilitative health care services in a systematic way to individuals, families, or communities.