Use a Calculator to Evaluate the Trigonometric Function $\cos 400 ^ { \circ }$

question 58

Multiple Choice

Use a calculator to evaluate the trigonometric function $\cos 400 ^ { \circ }$ to four decimal places.

• A)-1.0827
• B)1.1918
• C)-0.9236
• D)0.7660
• E)0.8391

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Definitions:

Slope

Refers to the steepness or inclination of a line on a graph, representing the rate of change between two variables.

Marginal Rate

Typically refers to the rate at which one additional unit of something affects the overall outcomes, often used in contexts like marginal tax rate or marginal rate of substitution in economics.

Slope

A measure of the steepness, incline, or gradient of a line, usually calculated as the ratio of the vertical change to the horizontal change between two points.

Isoquant

A curve that represents all the combinations of two inputs that produce the same level of output in the production process.