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Introduction to Trigonometry: Solving for Adjacent Side using Cosine (Type 1)

Subject MathGeometry
Grade Level Grades 9-12, Higher Education, Adult Education
Resource Type Assessment, Handout
Standards Alignment
Common Core State Standards, State-specific

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Thanks to my former students asking "is this the easiest way to learn trigonometry." We have simplified right angle trigonometry to make it easier for students to learn.  We start by using only Cosine and we have named them: type one, type two, and type three trig. Pythagorean's theorem has previously been covered. In type one we have the Hypotenuse length and the adjacent angle and find the adjacent side length. The following are attached: Power-point, Instruction sheet, and corresponding Assignments.  One of the first things we do is verify all the scientific calculators the students are using are programed correctly to enter the formulas like in the instructions. Some calculators are progamed so the formulas must be entered in backwards.

Also check out these trigonometry lessons:

Resources

Files

Trigonometry type_1_web.ppt

Assessment
February 10, 2020
0.9 MB
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Trig_hwrk_adj_type1_B_pg1.pdf

Assessment
February 13, 2020
0.1 MB
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Trig_hwrk_adj_type1_B_pg2.pdf

Assessment
February 13, 2020
0.1 MB
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Cosine type 1 Instructions.pdf

Handout
February 13, 2020
0.1 MB
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Trig_hwrk_adj_type_1_c_pg1.pdf

Assessment
February 13, 2020
0.1 MB
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Trig_hwrk_adj_type_1_c_pg2.pdf

Assessment
February 13, 2020
0.1 MB
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Trig_hwrk_adj_type_1_c_pg3.pdf

Assessment
February 13, 2020
0.1 MB
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Geometry Type 1 Trig_Angled Roof_pg1.pdf

Assessment
February 13, 2020
0.1 MB
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Geometry Type 1 Trig_Angled Roof_pg2.pdf

Assessment
February 13, 2020
0.1 MB
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Geometry Type 1 Trig_Angled Roof_pg3.pdf

Assessment
February 13, 2020
0.1 MB
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Geometry Type 1 Trig_Angled Roof_pg4.pdf

Assessment
February 13, 2020
0.1 MB
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Hwrk_Slope_Line_Roofs_etc_2.pdf

Assessment
February 13, 2020
0.1 MB
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Standards

Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.
Understand and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles (e.g., surveying problems, resultant forces).

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