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Sine for OCR A-level Maths

Sine

This page covers the following topics:

1. Sine
2. Sine graphs and transformations

Sine of an angle is a ratio between the side opposite to the angle and the hypotenuse of a triangle.

Sine

The diagram shows a sine graph.

Sine graphs and transformations

1

Find sinB if b = 5 and c = 25.

1/5 or 0.2

Find sinB if b = 5 and c = 25.

2

Write down the coordinates of point A on the sine graph.

(90ยบ, 1)

Write down the coordinates of point A on the sine graph.

3

Find sinA if a = 7 cm and c = 10 cm.

7/10 or 0.7

Find sinA if a = 7 cm and c = 10 cm.

4

Find a if sinA = 0.5 and c = 8.

4

Find a if sinA = 0.5 and c = 8.

5

Sketch the graph of y = sin(x โˆ’ ฯ€) + 2.

image

Sketch the graph of y = sin(x โˆ’ ฯ€) + 2.

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