HSG-SRT.C.7

Explain and use the relationship between the sine and cosine of complementary angles.

 
17 Lesson(s)
   

Formalizing Properties Known Informally

12th Grade Math » Unit: Trigonometric Identities
12th Grade Math » Unit: Trigonometric Identities
Katharine Sparks
Independence, MO
Environment: Suburban
 
Big Idea:

How can I find the value of other trigonometric functions if I only know one or two values?

 
Favorites (1)
 
Resources (20)
 
Reflections (2)
identities image resized
   

Solving Triangles with Trigonometry

Geometry » Unit: Introduction to Trigonometry
Geometry » Unit: Introduction to Trigonometry
Tom Chandler
Ault, CO
Environment: Rural
 
Big Idea:

Students refine their strategies for applying trigonometric relationships. Now we see trigonometry from every side—and angle!

 
Favorites (2)
 
Resources (13)
trig tables
   

Properties of Sine and Cosine

Geometry » Unit: Introduction to Trigonometry
Geometry » Unit: Introduction to Trigonometry
Tom Chandler
Ault, CO
Environment: Rural
 
Big Idea:

Exploring the meaning of sine and cosine as ratios and as relationships. Trigonometry is just similar triangles—but better!

 
Favorites (5)
 
Resources (22)
propertiesofsineandcosine studentwork
   

Co-Function Identities

12th Grade Math » Unit: Trigonometric Identities
12th Grade Math » Unit: Trigonometric Identities
Katharine Sparks
Independence, MO
Environment: Suburban
 
Big Idea:

Through reasoning students can verify identities for trigonometric functions.

 
Favorites (2)
 
Resources (17)
complementary angles
   

Trig Time

Geometry » Unit: Trig Trickery
Geometry » Unit: Trig Trickery
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Aiming for perfection with practice, what's your sine? Cosine and tangent too!

 
Favorites (9)
 
Resources (13)
trig image
   

Applied Trig Time

Geometry » Unit: Trig Trickery
Geometry » Unit: Trig Trickery
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will persevere through challenging real-world problems involving the Eiffel Tower and puppies.

 
Favorites (6)
 
Resources (15)
eiffle tower image
   

Finishing Up the Similar Triangles Project

12th Grade Math » Unit: Trigonometry: Triangles
12th Grade Math » Unit: Trigonometry: Triangles
James Dunseith
Worcester, MA
Environment: Urban
 
Big Idea:

It's time for students to synthesize what they've learned about the trigonometric ratios, precision, similarity, and patterns. Today's work period gives students a chance to clarify their thinking and to put it in writing.

 
Resources (14)
brainiacs li resized1
   

More on Finding Lengths of Segments

Geometry » Unit: Right Triangle Trigonometry
Geometry » Unit: Right Triangle Trigonometry
Beth Menzie
Amsterdam, NY
Environment: Urban
 
Big Idea:

Students continue to apply trig functions, while also learning about the relationship between the sine and cosine of complementary angles.

 
Favorites (8)
 
Resources (16)
more on finding side lenghts lesson image
   

Solving Right Triangles

12th Grade Math » Unit: Solving Problems Involving Triangles
12th Grade Math » Unit: Solving Problems Involving Triangles
Katharine Sparks
Independence, MO
Environment: Suburban
 
Big Idea:

After reading and drawing diagrams for word problems students use the right triangle ratios to solve the problems.

 
Favorites (1)
 
Resources (19)
 
Reflections (1)
rt triangle
   

Trigonometric Identities - Day 2 of 2

12th Grade Math » Unit: Trigonometric Relationships
12th Grade Math » Unit: Trigonometric Relationships
Tim  Marley
Troy, MI
Environment: Suburban
 
Big Idea:

Identifying what makes a trig expression confusing will keep you focused on what needs to be simplified.

 
Resources (7)
untitled
   

Progress Check and Homework Review 1

Geometry » Unit: Triangles and Congruence
Geometry » Unit: Triangles and Congruence
Tom Chandler
Ault, CO
Environment: Rural
 
Big Idea:

Student questions are the focus of the lesson as students grade their own homework and prepare for a homework quiz.

 
Resources (22)
quote polya
   

Trigonometric Ratios

Geometry » Unit: Geometric Trigonometry
Geometry » Unit: Geometric Trigonometry
Marisa Laks
New York, NY
Environment: Urban
 
Big Idea:

Students explore the relationship between trigonometric ratios in right triangles.

 
Favorites (2)
 
Resources (16)
 
Reflections (1)
trig image
   

Using Right Triangles to Make the Unit Circle

12th Grade Math » Unit: Trigonometry: The Unit Circle
12th Grade Math » Unit: Trigonometry: The Unit Circle
James Dunseith
Worcester, MA
Environment: Urban
 
Big Idea:

By looking for connections between right triangle trig and unit circle trig, we can discover some common sense embedded in both.

 
Resources (14)
impossibletriangle
   

The Pythagorean Identities

12th Grade Math » Unit: Trigonometric Identities
12th Grade Math » Unit: Trigonometric Identities
Katharine Sparks
Independence, MO
Environment: Suburban
 
Big Idea:

How can the Pythagorean Identities and other fundamental identities be used to simplify expressions.

 
Favorites (1)
 
Resources (15)
 
Reflections (1)
pyth pic
   

Problem Solving Identities

12th Grade Math » Unit: Trigonometric Identities
12th Grade Math » Unit: Trigonometric Identities
Katharine Sparks
Independence, MO
Environment: Suburban
 
Big Idea:

Through the use of algebra and known identities other identities can be verified.

 
Resources (10)
 
Reflections (1)
study
Common Core Math
 
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