Double angle and half angle identities
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Double-Angle and Half-Angle Identities. Section 5.3. Objectives. Apply the half-angle and/or double angle formula to simplify an expression or evaluate an angle. Apply a power reducing formula to simplify an expression. . Double-Angle Identities. Half-Angle Identities.

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Double-Angle and Half-Angle Identities

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Double-Angle and Half-Angle Identities

Section 5.3


Objectives

  • Apply the half-angle and/or double angle formula to simplify an expression or evaluate an angle.

  • Apply a power reducing formula to simplify an expression.


Double-Angle Identities


Half-Angle Identities


Power-Reducing Identities


Use a half-angle identity to find the exact value of


If find the values of the following trigonometric functions.


If find the values of the following trigonometric functions.


Use the power-reducing formula to simplify the expression

Is there another way to simplify this without using a power-reducing formula?


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