Use the Half-Angle Formulas to Simplify the Expression $\sqrt { \frac { 1 + \cos 8 x } { 2 } }$

question 7

Multiple Choice

Use the half-angle formulas to simplify the expression.
$\sqrt { \frac { 1 + \cos 8 x } { 2 } }$

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Definitions:

Intrinsically Motivated

Refers to being motivated by internal factors, such as personal satisfaction or the joy of doing something, rather than by external rewards.

Extrinsic Motivation

The drive to perform or engage in an activity due to external rewards or pressures, rather than for intrinsic enjoyment or satisfaction.

Intrinsic Motivation

is the internal drive to perform an activity for its own sake, deriving pleasure and satisfaction from the activity itself rather than external rewards.

Extrinsic Motivation

Motivation driven by external rewards such as money, fame, grades, or praise, rather than for the inherent enjoyment of the activity itself.