Find the Definite Integral $\int _ { 0 } ^ { \pi / 9 } x \cos 9 x d x$

question 81

Multiple Choice

Find the definite integral. $\int _ { 0 } ^ { \pi / 9 } x \cos 9 x d x$

• A) \(\frac { 2 } { 81 }\)
• B) \(- \frac { 2 } { 81 }\)
• C) \(- \frac { 4 } { 9 }\)
• D) \(- \frac { 2 } { 9 }\)
• E) \(\frac { 4 } { 9 }\)

---

Definitions:

Evil Spirits

Believed entities in many cultures and religions, considered to be malevolent forces or beings.

Social Identity

An individual's sense of belonging to particular social groups, defined by various group characteristics or affiliations.

Personality Development

The gradual formation and evolution of an individual's character and behavioral traits over time.