Learning Goal
Trigonometric ratios (SOH-CAH-TOA)
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.
G 509. Express the sine, cosine, and tangent of an angle in a right triangle as a ratio of given side lengths
G 604. Apply basic trigonometric ratios to solve right-triangle problems
G 603. Apply properties of 30°-60°-90°, 45°-45°-90°, similar, and congruent triangles
G 602. Use the Pythagorean theorem
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G 509. Express the sine, cosine, and tangent of an angle in a right triangle as a ratio of given side lengths
G 604. Apply basic trigonometric ratios to solve right-triangle problems
G 603. Apply properties of 30°-60°-90°, 45°-45°-90°, similar, and congruent triangles
G 602. Use the Pythagorean theorem
What you'll learn
- Label the hypotenuse, the opposite side and the adjacent side relative to a specified acute angle in a right triangle, and relabel them when the specified angle changes
- Write sin, cos and tan of a specified angle as a ratio of given side lengths, reduced to lowest terms
- Find a missing side using the Pythagorean theorem in order to write a requested ratio
- Explain why a trig ratio depends only on the angle and not on the size of the triangle, using similar triangles
- State the exact values of sin, cos and tan at 30, 45 and 60 degrees by reading them off the two special triangles, in rationalized form
Slides
Step through the lesson, or watch it as a narrated video
Slides
In development
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