Use the Half-Angle Formulas to Find the Exact Value of the Trigonometric

question 199

Multiple Choice

Use the Half-angle Formulas to find the exact value of the trigonometric function.
- $\cos 22.5 ^ { \circ }$

• A) \(\frac { 1 } { 2 } \sqrt { 2 - \sqrt { 2 } }\)
• B) \(- \frac { 1 } { 2 } \sqrt { 2 - \sqrt { 2 } }\)
• C) \(- \frac { 1 } { 2 } \sqrt { 2 + \sqrt { 2 } }\)
• D) \(\frac { 1 } { 2 } \sqrt { 2 + \sqrt { 2 } }\)

---

Definitions:

Extratherapeutic Factors

These are elements outside of therapy itself that can influence a client's healing process, such as personal strengths, social support, and environmental factors.

Effectiveness of Therapy

Refers to how well a specific therapeutic intervention achieves its intended outcomes or benefits for patients.

Client Diversity

This term refers to the range of different characteristics, backgrounds, and experiences that clients bring to a therapeutic or professional setting.

Confidential Information

Sensitive or private information that is not to be disclosed to unauthorized individuals, especially pertaining to personal data in therapeutic settings.