Find the Exact Value of the Expression $\tan ^ { - 1 } ( 1 )$

question 274

Multiple Choice

Find the exact value of the expression.
- $\tan ^ { - 1 } ( 1 )$

• A) \(\frac { \pi } { 4 }\)
• B) \(\frac { 5 \pi } { 4 }\)
• C) \(\frac { 3 \pi } { 4 }\)
• D) \(\frac { 7 \pi } { 4 }\)

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Definitions:

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In an experiment, these are variables manipulated by the researcher to observe how they affect the dependent variable.

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A measurement of how many words or characters one can type in a set amount of time, often gauged in words per minute (WPM).

Keyboard Design

The arrangement and layout of keys in a keyboard, which includes considerations of ergonomics, usability, and efficiency for typing.

Placebo Effect

The phenomenon in which the expectations of the participants in a study can influence their behavior.