Year 10
Core
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Lesson details
Key learning points
- In this lesson, we will find a missing angle in a given triangle using the inverse trigonometric functions. We will need to interpret which trigonometric ratio to use, and rearrange it.
Licence
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3 Questions
Q1.
Use your calculator find the value of cos(56) to 3 decimal places.
0.560
0.829
Others
Q2.
Use your calculator find the value of tan(89) to 3 decimal places.
1.000
Error
Others
Q3.
3. Use your calculator to work out the size of sinѲ = 0.21 . Give your answer to one decimal place.
21.0 degrees
Error
Others
3 Questions
Q1.
Which of the trigonometry ratios will be required to find the missing angle in this question?
inverse cosine
inverse tangent
Q2.
Find the missing angle, giving your answer to 1 decimal place.
60 degrees
72.1 degrees
Q3.
Find the missing angle, giving your answer to 1 decimal place.
27.6 degrees
48.4 degrees