Solve basic trigonometry equations
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Lesson details
Key learning points
- In this lesson, we will use a calculator to work out values of angles by rearranging trigonometric equations relating to sides and angles and using inverse trigonometric functions.
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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3 Questions
Q1.
If b is the base, identify the perpendicular height of this triangle.
s
u
Q2.
Find the perpendicular height of the triangle.
0.0333… cm
1 cm
Q3.
Find the perpendicular height of the triangle. Give your answer to one decimal place.
5.9 cm
8 cm
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