Finding Missing Angles in Right Triangles

This video tutorial teaches how to find missing angles in right triangles using trigonometric ratios. It covers the use of inverse trigonometric functions like sine, cosine, and tangent, with practical examples using a calculator. Students are guided through exercises in a trigonometry flip book and are given assignments to reinforce learning.

What tools do you need for this lesson?

• Notebook, pencil, calculator, and trigonometry flip book

• Notebook, pen, ruler, and trigonometry flip book

• Notebook, pencil, protractor, and trigonometry flip book

• Notebook, pen, calculator, and trigonometry flip book

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

What symbol represents the inverse trigonometric functions?

• A division sign

• A multiplication sign

• A negative one

• A plus sign

Tags

CCSS.HSF.TF.B.7

What is the inverse cosine of 25/36?

• 18.1 degrees

• 54.7 degrees

• 36.9 degrees

• 46.02 degrees

Tags

CCSS.HSG.SRT.C.8

Which trigonometric function should you use if you have the opposite side and hypotenuse?

• Inverse secant

• Inverse tangent

• Inverse sine

• Inverse cosine

Tags

CCSS.HSG.SRT.C.8

What is the angle measure when using inverse sine of 31/38?

• 46 degrees

• 54.7 degrees

• 32.2 degrees

• 40 degrees

Tags

CCSS.HSG.SRT.C.8

Which sides do you use with the inverse cosine function?

• Adjacent and opposite

• Adjacent and hypotenuse

• Opposite and hypotenuse

• Opposite and adjacent

Tags

CCSS.HSG.SRT.C.6

What is the angle measure when using inverse cosine of 19/24?

• 54.7 degrees

• 37.7 degrees

• 31 degrees

• 40 degrees

Tags

CCSS.HSG.SRT.C.8

Which trigonometric function should you use if you have the opposite side and adjacent side?

• Inverse cosine

• Inverse sine

• Inverse tangent

• Inverse secant

Tags

CCSS.HSG.SRT.C.8

What is the angle measure when using inverse tangent of 21/25?

• 54.7 degrees

• 37.7 degrees

• 31 degrees

• 40 degrees

Tags

CCSS.HSG.SRT.C.8

Which column do you use if you are finding the angle measure?

• Third column

• Second column

• First column

• Fourth column

Tags

CCSS.4.MD.C.6