Year 10
Higher
Use sine and cosine to find a length
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Lesson details
Key learning points
- In this lesson, we will calculate missing lengths using sine and cosine trigonometric ratios.
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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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4 Questions
Q1.
1. Solve the equation to 1 decimal place
x = 10.0
x = 200.0
x = 28.3
Q2.
2. Find the length of y, to 3 significant figures
0.16m
6.23 m
Q3.
3. Find the length AC, to 2 decimal places
0.14 km
9.29 km
Q4.
4. Find the perimeter of this rectangle, to 3 significant figures
15.77 cm
15.8 cm
47.3 cm
4 Questions
Q1.
Solve this equation to 2 decimal places
x = 0.19
x = 4.70
Q2.
Find the length of y, to 3 significant figures
0.16 m
1.59 m
6.10 m
Q3.
Here is a right-angled isosceles triangle. Find the length AC to 2 decimal places.
0.14 cm
3.5 cm
7.07 cm
Q4.
4. Find the radius of this circle, to 3 significant figures. xy = 5.5 cm and angle xyz = 40
3.89 cm
7.18 cm
7.78 cm