Explain sine and cosine relationship
Start lessonBegins with Sine cosine complementary foundations · 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.
HSG.SRT.C.7
**HSG.SRT.C.7**: Explain and use the relationship between the sine and cosine of complementary angles.
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HSG.SRT.C.7: Explain and use the relationship between the sine and cosine of complementary angles.
What you'll learn
- Define complementary angles and identify complementary angle pairs in right triangles
- Explain why the sine of one acute angle equals the cosine of its complement
- Prove the complementary angle relationship using right triangle geometry
- Apply the relationship sin(theta) = cos(90 degrees - theta) to solve problems
- Use the complementary relationship to find trig values without a calculator
- Understand how this relationship simplifies trigonometric calculations
Review first:
Slides
Step through the lesson, or watch it as a narrated video • 2 slide decks
1
Sine cosine complementary foundations
✓ Start here2
Sine cosine complementary applications
Practice
Try it on your own
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