Trigonometry

Question 1

What is the Sine rule?

What conditions are needed to use the sine rule?

Answer 1

1. Two sides and one angle
2. Two angles and one side

Question 2

What is the cosine rule?

What conditions are needed to use the cosine rule?

Answer 2

1. Two sides and the included angle (allows you to find side opp the angle)
2. All three sides ( allows you to find an included angle)

Question 3

What two rules can be applied to non right angle triangles?

Answer 3

1. The sine rule
2. The cosine rule

Question 4

What two ways can bearings be represented?

Answer 4

1. True bearings
2. Conventional (compass) bearings

Question 5

Describe a convential (compass) bearing.

Answer 5

The conventional bearing of a point is stated as the number of degrees east or west of the north-south line.

Question 6

Describe a true bearing.

Answer 6

The true bearing to a point is the angle measured in degrees in a c_lockwise direction from the north line._

Question 7

When dealing with worded Trigonmetry style questions what are some important tips.

Answer 7

1. underline all important information in the question.
2. Transfer this information into a diagram.
3. draw a compass bearing for each point (where suitable)

If stuck ………………………………………………………

Fill in as many missing angles as possible and don’t forget your non right angle trig formulas

Question 8

What is an angle of elevation?

Answer 8

Question 9

What is an angle of depression?

Answer 9