Trigonometry

Trigonometry (Revision)

by Teacher Henny

Open Ended

State your name and class here (e.g. Wali YR11G3)

Poll

How are you feeling today?

• I am feeling great!!

• I am ok today but not always..

• Not so great...

• I feel lost..not sure what to do.

​Before we continue with our lesson, I would like to encourage you to be PERSISTENT!

​

​These are difficult times but we need to push on and have a positive mindset!

​TRIGONOMETRY (REVISION)

LESSON OBJECTIVE:

• ​recall on the important concepts in trigonometry.

​

​STEPS TO SUCCESS:

​know what SOH, CAH, TOA is.

​know how to apply Pythagoras Theorem

​know how to calculate adjacent, opposite or hypotenuse in a right angled triangle.

Multiple Choice

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

• Any triangle ever

• Non-right triangles only

• Right Triangles only

• Never

Multiple Choice

The ratio in a right triangle of adjacent to hypotenuse is _____

• sine
• cosine
• tangent
• inverse cosine

Multiple Choice

 Find side AB?

• 20 m
• 5 m
• 11.54 m
• 8.66 m

Multiple Choice

Choose the correct ratio.

• A
• B
• C
• D

Multiple Choice

Find the length of side w.

• 21.4 cm

• 18.0 cm

• 36.5 cm

• 43.6 cm

Multiple Choice

Solve for x.

• 24.20

• 4.92

• 290.4

• 29.75

Multiple Choice

Find the measure of the indicated angle (?) round to the nearest tenth.

• 9.4

• 55.2

• 20.15

• 19.4

Multiple Choice

Solve for the misssing distance

• 18.9

• 19.5

• 47

• 27.5

Multiple Choice

Solve for x.

• 10

• 11.3

• 12.0

• 15.0

​We will discuss the corrections through WA ya