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# Functions: Trigonometric Functions207 preguntas11 habilidades

## HSF-TF.A.1

Understand radian measure of an angle as the length of the arc on the unit circle subtended by the angle.
Pronto habrá nuevas habilidades para este estándar.

## HSF-TF.A.2

Explain how the unit circle in the coordinate plane enables the extension of trigonometric functions to all real numbers, interpreted as radian measures of angles traversed counterclockwise around the unit circle.
Pronto habrá nuevas habilidades para este estándar.

## HSF-TF.A.3

Use special triangles to determine geometrically the values of sine, cosine, tangent for π/3, π/4 and π/6, and use the unit circle to express the values of sine, cosine, and tangent for x, π + x, and 2π – x in terms of their values for x, where x is any real number.

## HSF-TF.A.4

Use the unit circle to explain symmetry (odd and even) and periodicity of trigonometric functions.
Pronto habrá nuevas habilidades para este estándar.

## HSF-TF.B.5

Choose trigonometric functions to model periodic phenomena with specified amplitude, frequency, and midline.

## HSF-TF.B.6

Understand that restricting a trigonometric function to a domain on which it is always increasing or always decreasing allows its inverse to be constructed.