Sine and cosine graphs

Maths

Surds and trigonometry

The image below shows the graph of ......

Use the graph to give an approximate value for sin (40).

Use the graph to give an approximate value for cos (80).

Fill in the gap: You can use the inverse sine function to work out the unknown angle, when given the opposite and ................. in a right- angled triangle.

Fill in the gap: You can use the inverse cosine function to work out the unknown angle, when given the hypotenuse and ................. in a right- angled triangle.

Use the sine ratio to find out the missing angle in the triangle shown below.

Which is the correct method to work out the missing angle?

Which is the correct method to work out the length of missing side?

Sine and cosine graphs

Lesson outcome