Use the Half-Angle Formulas to Simplify the Expression

question 16

Multiple Choice

Use the half-angle formulas to simplify the expression. ​
​ ​

• A)​- ​|cos x|
• B)​|cos x|
• C)​​|cos 4x|
• D)​​- |cos 4x|
• E)​- ​|cos 8x|

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Definitions:

Pollution Cleanup

The process of removing contaminants from the environment, including soil, water, and air, to reduce pollution and restore ecosystems to their natural state.

Technological Impact

The effect of technology on society and the environment, which can be positive, negative, or neutral.

Consumption Per Person

The average amount of a resource, product, or energy used by a single individual, often used to assess lifestyle impacts on the environment or to gauge economic activity.

Biodiversity Degradation

The reduction or loss of biodiversity from ecosystems, typically due to human activities like deforestation, pollution, and climate change.