# T.7 - Calculator

T.7  The student will determine the value of any trigonometric function and inverse trigonometric function.

### UNDERSTANDING THE STANDARD

2016 VDOE Curriculum Framework - T.7 Understanding

·  The trigonometric function values of any angle can be found by using a graphing utility.

·  The inverse trigonometric functions can be used to determine angle measures whose trigonometric function values are known.

·  Calculations of inverse trigonometric function values can be related to the triangular definitions of the trigonometric functions.

·  Trigonometric functions are not invertible, because they are periodic.  Domain restrictions on trigonometric functions are necessary in order to determine the inverse trigonometric function.

### ESSENTIALS

The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to

·  T.71  Use a graphing utility to determine the trigonometric function values of any angle in either degrees or radians.

·  T.72  Define inverse trigonometric functions.

·  T.73  Determine angle measures by using the inverse trigonometric functions when the trigonometric function values are given.

### KEY VOCABULARY

Updated: May 29, 2018