Sine and Cosine Rule (Wed 15th Sept -YR 11G3 SMK 2021)

Sine and Cosine Rule (YR 11G3 SMK 2021)

by Teacher Henny

​Wednesday 15th Sept 2021

​Virtual Lesson

​Good morning everyone!!!

​I hope that you had your breakfast already.............

​

​There is an ice-breaker quiz for you, Just for Fun!

Poll

Would you rather...

• be able to travel to the past

• Be able to travel to the future

Poll

Would you rather...

• Go to the school building from 7:00 am to 7:00 pm Monday-Friday

• Never go to the school building and do all schooling remotely

Poll

Would you rather...

• Be able to speak every language

• Be able to speak to animals

Poll

Would you rather....

• Be able to fly

• Have x-ray vision

• Read people's minds

• Have super strength

Poll

Would you rather...

• always feel cold

• always feel hot

​SINE AND COSINE RULE

​LO: recall on the Sine and Cosine Rule and apply the formula in some math problems.

​SINE AND COSINE RULE

​LO: recall on the Sine and Cosine Rule and apply the formula in some math problems.

​SINE AND COSINE RULE

​LO: recall on the Sine and Cosine Rule and apply the formula in some math problems.

Multiple Choice

When using the sine rule how many parts (fractions) do you need to equate?

• All 3 parts

• 1 part

• 2 parts

Multiple Choice

• 6.99

• 6.33

• 13.59

• 7.83

Multiple Choice

What is the measure of angle A?

• 50 degrees
• 60 degrees
• 78 degrees
• 74 degrees

Multiple Choice

Which of the following formulas is the Cosine rule?

• c² = a² + b² - 4ac + cosA
• c² = a² - b² - 2abcosC
• c² = a² + b² - 2abcosC
• (cos A)/a = (cos B)/b

Multiple Choice

We can use SOH-CAH-TOA for...

• Any triangle ever
• Non-right triangles only
• Right Triangles only
• Never

Multiple Choice

Which rule can be used directly for this triangle?

• The Sine Rule
• The Cosine Rule
• The Area of a Triangle
• Pythagoras' Theorem

Multiple Choice

What rule should you use?

• Sine

• Cosine

Multiple Choice

What rule should you use?

• Sine

• Cosine

Multiple Choice

• 10.1

• 10.0

• 10.9

• 8.86

Multiple Choice

What rule should you use?

• Sine
• Cosine

​THAT'S IT! WE ARE DONE.

​

​I HOPE TODAY'S LESSON WAS FRUITFUL. WE WILL DISCUSS THROUGH WA ANY QUESTIONS THAT YOU HAVE FROM TODAY'S LESSON.