Reflection: Intervention and Extension Finding the angle when given the function value - Section 2: Find the angle

Some students struggle with problems such as sqrt(2)/2 when they use the triangles to determine the angles. This struggle is more with realizing that the fraction has been rationalized than with understanding how to find the angle. I usually have a student that will state that sqrt(2)/2 has been rationalized. I will then ask "What was the expression before it was rationalized?"

Rationalized values
Intervention and Extension: Rationalized values

Finding the angle when given the function value

Unit 7: Trigonometry as a Real-Valued Functions
Lesson 9 of 13

Big Idea: How many angles have the same trigonometric value.

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Standards:
Subject(s):
Math, Trigonometric functions, special angles, unit cir
40 minutes

Katharine Sparks

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