trigonometry l.o. › uploads › 2 › 4 › 2 › 1 › ... · trigonometry 2. real life...

L.O.All will be able to remember the sine rule

Most can find missing angles using Cosine Rule

Some can find missing sides using Cosine Rule

Trigonometry

Starter:

Calculate the size of angle b giving your answer to 2 decimal places.

Starter:

L.O.All will be able to remember the sine rule

Most can find missing angles using Cosine Rule

Some can find missing sides using Cosine Rule

Trigonometry 2

What about...?

Calculate the length of AC giving your answer to 3 significant figures.

Calculate the size of angle a giving your answer to 1 decimal place.

Cosine Rule

What information do we need to apply the Cosine Rule?

Circle if we can apply the Cosine Rule

L.O.All will be able to remember the sine rule

Most can find missing angles using Cosine Rule

Some can find missing sides using Cosine Rule

Trigonometry 2

Find the length of each side marked with a letter

ExtensionCreate and draw your own non right triangle problem that requires the Cosine Rule to calculate missing sides. Give this to the person next to you to answer. Mark their work.

Missing Side Solutions

a = 9.88 cm

b = 9.03cm

c = 10.8 cm

d = 8.01 cm

L.O.All will be able to remember the sine rule

Most can find missing angles using Cosine Rule

Some can find missing sides using Cosine Rule

Trigonometry 2

We need to make angle A the subject

What is the inverse of cos?

ExtensionCreate and draw your own non right triangle problem that requires the Cosine Rule to calculate missing angles. Give this to the person next to you to answer. Mark their work.

Missing Angle Solutions

a = 35.9o

b = 64.5o

c = 26.2o

d = 29.3o

L.O.All will be able to remember the sine rule

Most can find missing angles using Cosine Rule

Some can find missing sides using Cosine Rule

Trigonometry 2

GCSE QUESTION

GCSE QUESTION

L.O.All will be able to remember the sine rule

Most can find missing angles using Cosine Rule

Some can find missing sides using Cosine Rule

Trigonometry 2

Real Life Question

An AWACS aircraft takes off from RAF Waddington (W) on a navigation exercise. It flies 530 miles North to a point (P) as shown, It then turns left and flies to a point (Q), 670 miles away. Finally it flies back to base, a distance of 520 miles.

Find the bearing of Q from point P.

P

670 miles

W

530 miles

Q

520 miles