Solve the Given Equation $9 \cos ^ { 2 } \theta - 6 \cos \theta + 1 = 0$

question 34

Essay

Solve the given equation. $9 \cos ^ { 2 } \theta - 6 \cos \theta + 1 = 0$

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Definitions:

Electrical Stimulation

A therapeutic or research technique that involves applying electrical current to stimulate nerves, muscles, or brain areas.

Luigi Galvani

An 18th-century Italian physician and scientist known for his discovery of bioelectricity, especially in the context of muscle movement.

Gustave Fritsch

A nineteenth-century neuroscientist known for his pioneering work on the electrical stimulation of the brain.

Roberts Bartholow

A 19th-century American physician known for his pioneering work in neurology and for an ethical controversy in medically experimenting with electrical stimulation on a human subject's exposed brain.