Use Addition or Subtraction Formulas to Find the Exact Value $\tan \left( - 15 ^ { \circ } \right)$

question 42

Essay

Use addition or subtraction formulas to find the exact value of $\tan \left( - 15 ^ { \circ } \right)$ .

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Definitions:

Participant Observation

A research method where the observer becomes an active part of the community or group being studied to gain deeper insights.

Sociometry

A quantitative method for measuring social relationships, often used to identify social networks and patterns within groups.

Group Structure

The arrangement or organization of relations between members within a group.

Group Behavior

The actions, norms, and psychological processes that occur within a social group or between social groups.