Cosine and Sine Rule

What rule should you use?

• Sine
• Cosine

What rule should you use?

• Sine
• Cosine

What rule should you use?

• Sine
• Cosine

• 10.1
• 10.0
• 10.9
• 8.86

• 6.99
• 6.33
• 13.59
• 7.83

What is the measure of angle A?

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

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

• All 3 parts
• 1 part
• 2 parts

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

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

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

Which rule can be used directly for this triangle?

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