Use an Identity to Write the Expression as a Single $2 \cos ^ { 2 } 75 ^ { \circ } - 1$

question 173

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- $2 \cos ^ { 2 } 75 ^ { \circ } - 1$

• A) \(\frac { 1 } { 2 }\)
• B) \(- \frac { 1 } { 2 }\)
• C) \(- \frac { \sqrt { 3 } } { 2 }\)
• D) \(\frac { \sqrt { 3 } } { 2 }\)

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Definitions:

Leads

In the context of electrocardiography, it refers to the specific configurations of electrodes on the body to record the electrical activity of the heart from different angles.

Electrical Activity

The movement of electrical charges or currents, often referring to such phenomena in the nervous system or the heart.

Peak Flow Rate

A measure of how quickly air can be expelled from the lungs, used to monitor breathing conditions like asthma.

Asthma

A condition in which the tubes of the bronchial tree become obstructed due to inflammation.