## Reflection: Intervention and Extension Graphs of Sine and Cosine - Section 1: Section 1: Warm Up and Homework Review

The goal of this warm up was to remind students about the relationship between a point on the unit circle and the trigonometric ratios.  This is the power of the unit circle and is fundamental to the success of today’s lesson where we will take these amounts to graph sine and cosine.  I received several warm ups like Warm Up 2 where they described the three trig ratios in terms of p and q which is exactly where I wanted them to go.    Others gave me responses that were correct but unimportant to the lesson (Warm Up 3) or purely incorrect (Warm Up 1).  I really think that the key to this lesson on trigonometric functions is a solid understanding of the unit circle.   Some students were more comfortable after today’s activity but I think next year I will spend more time on the unit circle to ensure that more students are really confident.

Intervention and Extension: The Unit Circle is Very Important For Graphing Sine and Cosine Functions

# Graphs of Sine and Cosine

Unit 9: Trigonometric Functions
Lesson 8 of 19

## Big Idea: Students get to build the graph of sine or cosine with yarn and spaghetti.

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Standards:
Subject(s):
Math, Trigonometry, Trigonometric functions, unit circle, Algebra 2, master teacher project, sine function, cosine function, 11th Grade
48 minutes

### Amelia Jamison

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