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iGCSE (2021 Edition)

16.04 Exact ratios and the unit circle (Extended)

Interactive practice questions

Use the exact value triangles in the diagram below to answer the following:

a

What is the exact value of $\sin30^\circ$sin30°?

b

What is the exact value of $\sin60^\circ$sin60°?

c

What is the exact value of $\sin45^\circ$sin45°?

Easy
1min

Use the exact value triangles in the diagram below to answer the following:

Easy
1min

Use the exact value triangles in the diagram below to answer the following:

Easy
1min

$\theta$θ is an angle in a right-angled triangle where $\sin\theta=\frac{\sqrt{3}}{2}$sinθ=32.

Solve for the exact value of $\theta$θ.

Easy
< 1min
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Outcomes

0607E8.2

Exact values for the trigonometric ratios of 0°, 30°, 45°, 60°, 90°.

0607E8.3

Extension to the four quadrants, i.e. 0°–360°.

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