Finding Angles with Inverse Trig
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Objective
I can evaluate inverse trigonometric functions to find angles.
Part 1 of 4
Warm-up video
Kristen Watson · 6:43
We don't generate video — this one is by Kristen Watson on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
Inverse trigonometric functions are used to solve for missing angles of right triangles.
- 2
The inverse of cosine is cosine inverse, the inverse of sine is sine inverse, and the inverse of tangent is tangent inverse.
- 3
When using inverse trig functions, it is important to ensure your calculator is set to degrees mode.
Part 3 of 4
Practice
9 questions
What is the purpose of using inverse trigonometric functions?
Which inverse trigonometric function would you use to find an angle if you know the lengths of the opposite and hypotenuse?
Part 4 of 4
Exit ticket
Quick comprehension check
“In a right triangle, the side opposite an angle is 15 cm and the hypotenuse is 17 cm. What is the measure of the angle in degrees? Show your work.”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
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