Law of Cosines
Start lessonBegins with Law of cosines · Slides
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
F 706. Use trigonometric concepts and basic identities to solve problems
G 604. Apply basic trigonometric ratios to solve right-triangle problems
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F 706. Use trigonometric concepts and basic identities to solve problems
G 604. Apply basic trigonometric ratios to solve right-triangle problems
What you'll learn
- State the Law of Cosines: c^2 = a^2 + b^2 - 2ab*cos(C)
- Apply the Law of Cosines to find a missing side when given two sides and the included angle (SAS)
- Apply the Law of Cosines to find a missing angle when given all three sides (SSS)
- Explain why the Pythagorean theorem is a special case of the Law of Cosines when C = 90 degrees
- Decide from the given information whether a triangle calls for the Law of Cosines (SAS, SSS) or the Law of Sines (AAS, ASA, SSA)
Slides
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1
Law of cosines
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