Find the Exact Solutions of the Given Equation in the Interval

question 62

Multiple Choice

Find the exact solutions of the given equation in the interval [0, 2 $\pi$ ) . $\cos 2 x + 3 \cos x + 2 = 0$

• A) \(x = 0 , \pi , \frac { 2 \pi } { 3 } , \frac { 5 \pi } { 3 }\)
• B) \(x = \pi , \frac { \pi } { 3 } , \frac { 5 \pi } { 3 }\)
• C) \(x = \pi , \frac { 2 \pi } { 3 } , \frac { 4 \pi } { 3 }\)
• D) x = 0
• E) \(x = 0 , \pi , \frac { \pi } { 3 } , \frac { 4 \pi } { 3 }\)

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Definitions:

FIFO Method

A method of inventory valuation where the first items produced or purchased are the first ones to be expended or sold.

Equivalent Units

Units of production expressed in terms of fully completed units; a concept used in manufacturing to measure output in a period that factors in incomplete units.

Material

The substance or substances from which something is made or can be made, often used in reference to supplies used in manufacturing.

Conversion Costs

Costs incurred to convert raw materials into finished products, typically including labor and overhead expenses.