**Trigonometric equations and general solutions**

**Summary**

Use of a calculator to be taught after the investigative approach:

The graphs can be easily drawn by using *CASIO fx-82 ES Plus*

Example: Sketch the graph of y = sin(4x) and for x e[-90º;90º]

Step 5 : Plot the points from the table, which will look as follows:

**Strategies for graphical interpretations: Typical interpretation questions**

**Activity**

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