Suppose ABC Is a Right Triangle with Sides of Lengths $\cos \mathrm { A }$

question 86

Multiple Choice

Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length using
the Pythagorean theorem and then find the value of the indicated trigonometric function of the given angle. Rationalize
the denominator if applicable.
-Find $\cos \mathrm { A }$ when $a = 9$ and $b = 7$

• A) \(\frac { \sqrt { 130 } } { 7 }\)
• B) \(\frac { \sqrt { 130 } } { 9 }\)
• C) \(\frac { 7 \sqrt { 130 } } { 130 }\)
• D) \(\frac { 9 \sqrt { 130 } } { 130 }\)

---

Definitions:

Risperidone

An antipsychotic medication commonly used to treat schizophrenia and bipolar disorder, and it can also be used to treat irritability in people with autism.

Schizophrenia

A chronic and severe mental disorder affecting a person's ability to think, feel, and behave clearly, often resulting in delusions, hallucinations, and disordered thinking.

Meta-analysis

A statistical technique that combines the results of multiple studies to identify patterns, effects, or relationships in the data more effectively than in individual studies.

Therapy

A treatment intended to relieve or heal a disorder, often involving talking to a psychologist about one's problems and issues to find solutions.