# Know tangent, sine and cosine

In this lesson, we will learn how to correctly label a right-angled triangle, and identify the correct trigonometric ratio to use.

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Know tangent, sine and cosine

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Has this triangle been correctly labelled?

1/4

Q2.Why has this triangle been incorrectly labelled?

2/4

Q3.Which is the correct trigonometric ratio to use to calculate length y?

3/4

Q4.Which trig ratio would I use to calculate the diameter of this circle?

4/4

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Know tangent, sine and cosine

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Has this triangle been correctly labelled?

1/4

Q2.Why has this triangle been incorrectly labelled?

2/4

Q3.Which is the correct trigonometric ratio to use to calculate length y?

3/4

Q4.Which trig ratio would I use to calculate the diameter of this circle?

4/4

# Lesson summary: Know tangent, sine and cosine

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga