Tag Archives: SOHCAHTOA

Tuesday April 19, 2016

Learning Goal
I will choose an appropriate tool or strategy to solve problems involving acute triangles
I will explain when I can use primary trigonometry, sine and cosine laws

We will start by looking at some individual problems. How do you know when to use the following:

  • Pythagorean Theorem
  • SOHCAHTOA
  • Sine Law
  • Cosine Law

We will do a 4 Corners activity to reinforce when to use each tool.

Based on the problem you received, create a FRAYER summary to explain when and how to use it. I will model one for Pythagorean Theorem. I will collect these to make a class note.

Once finished, solve the problem you were given by finding any unknown sides AND angles in your triangle on a chart paper. We will post and review each other’s work.

Finally, try some Trigonometry Practice. Make sure to check your work!

Reminder: Midterm deadline is FRI!

 

Tuesday April 12, 2016

Learning Goal
I will use the primary trigonometric ratios to determine different sides and angles in right triangles
I will solve real-world problems by applying my understanding of trigonometry

 

Today we will begin with a challenge question:

You’re out in a field flying your kite.  You have just let out all 150 m of your kite string.  You estimate that the kite is at an angle of elevation from you of about 20°.  Can you calculate the height of your kite above the ground?

#cherryblossfest Kite Festival John Sonderman via Compfight

Next, you will work in pairs or three’s to solve a word problem using your knowledge of trigonometry. We will present and discuss each solution to help reinforce the concepts of SOHCAHTOA.

Make sure you practice these questions to help you master these concepts, and check your work as you go. Problem Solving with Trigonometry

Finally, your exit slip is to write a letter to me. Explain what you know about trigonometry and what you are still struggling with.

Monday April 11, 2016

Learning Goal
I will use the primary trigonometric ratios to determine different sides and angles in right triangles

 

Today we will do a bit of review to solidify concepts from Grade 10.

SOH-CAH-TOA

What does it mean? When do we use it?

I will be doing some “Think-Alouds” to model how to use SOH-CAH-TOA to determine missing angles and side lengths in right triangles. You should take notes! We will pause after each type of problem and you should give it a try with a partner.

Next, you can try some practice “Primary Trig Practice – Day 1” to make sure you are comfortable solving these types of problems because we will be applying these concepts to more challenging questions tomorrow. Remember to check your work!