Download Lesson 8 - Word Problems in 3D

Minds On
Determine the height of
the tree
Unit 4: Trigonometry
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Learning Goal:
 I can solve three dimensional trigonometry
problems
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Trig Identities Consolidation
sin2𝜃 + cos2𝜃 = 1
tan 𝜃 =
𝑆𝑖𝑛 𝜃
𝐶𝑜𝑠 𝜃
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Trig Identities Homework
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Cosine Law – How to find an unknown angle
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Cosine Law – How to find an unknown angle
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Determine the height of the balloon
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
A forest ranger at the top of a 95m tower sees a tent at an angle of
depression of 12°. Turning in a different direction, the ranger sees a
second tent at an angle of depression of 1 7°. The angle between the two
lines of sight is 40°. How far apart are the tents?
Unit 4: Trigonometry
Lesson 8 – Word Problems in 3D
Homework
Pg. 332 #3, 4, 6 - 9, 11
Skip # 7 and 8