Year 10
Higher

Use sine and cosine to find a length

Year 10
Higher

Use sine and cosine to find a length

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Lesson details

Key learning points

  1. In this lesson, we will calculate missing lengths using sine and cosine trigonometric ratios.

Licence

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4 Questions

Q1.
1. Solve the equation to 1 decimal place
An image in a quiz
x = 10.0
Correct answer: x = 20.0
x = 200.0
x = 28.3
Q2.
2. Find the length of y, to 3 significant figures
An image in a quiz
0.16m
Correct answer: 2.83 m
6.23 m
Q3.
3. Find the length AC, to 2 decimal places
An image in a quiz
0.14 km
Correct answer: 6.95 km
9.29 km
Q4.
4. Find the perimeter of this rectangle, to 3 significant figures
An image in a quiz
15.77 cm
15.8 cm
Correct answer: 31.5 cm
47.3 cm

4 Questions

Q1.
Solve this equation to 2 decimal places
An image in a quiz
x = 0.19
x = 4.70
Correct answer: x = 5.32
Q2.
Find the length of y, to 3 significant figures
An image in a quiz
0.16 m
1.59 m
Correct answer: 1.60 m
6.10 m
Q3.
Here is a right-angled isosceles triangle. Find the length AC to 2 decimal places.
An image in a quiz
0.14 cm
3.5 cm
Correct answer: 3.54 cm
7.07 cm
Q4.
4. Find the radius of this circle, to 3 significant figures. xy = 5.5 cm and angle xyz = 40
An image in a quiz
Correct answer: 3.59 cm
3.89 cm
7.18 cm
7.78 cm