This is a complete lesson plan introducing the sine ratio and guiding students to find the length of a side of a right triangle using sine. The inverse sine ratio is also covered. This lesson follows my lesson plan "Introduction to Trigonometry" which is also posted in my TPT Store.
I also have lesson plans on the cosine and tangent ratios posted. If you prefer to teach the three ratios in one lesson, I have the lesson "Sine, Cosine & Tangent" posted at:
This lesson includes an opening activity, minilesson with guided steps through the process, examples, class activities and a worksheet for homework. Answer keys included.
Common Core standards included on cover page for High School Geometry.
NOTE: You may need Equation Editor or MathType to make changes to some of the fractions or symbols.