Tan-1 and opposite-adjacent (t3g)





April 21st
t3d
11:30
Homework on
your table!
tan()=......
Today's exercises
Math A/C
24, 26, 27, 29, 31, 32
Math B/D
23, 27, 31, 32, 34

Discuss 26 later
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Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 3

This lesson contains 18 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 60 min

Items in this lesson





April 21st
t3d
11:30
Homework on
your table!
tan()=......
Today's exercises
Math A/C
24, 26, 27, 29, 31, 32
Math B/D
23, 27, 31, 32, 34

Discuss 26 later

Slide 1 - Slide

Schedule
  • Homework check                                           10 min
      Announcements
  • Review: tangent                                             10 min
  •                                                                                15 min
  • Practice                                                             20 min
  • Finally, some Gooseboard!                       20 min
tan()=......

Slide 2 - Slide

Programme

Slide 3 - Slide

Announcements
Got It!

Slide 4 - Slide

the gradient of a hill
vs.
its angle of elevation

Slide 5 - Mind map

Last lesson's
Intended Learning Outcomes


At the end of the lesson you could...
  1. Do calculations with gradient, grade,
    tangent and inverse tangent

Slide 6 - Slide

(inverse) tangent





shift --> tan
gets you tan
tan()=runrise
tan(runrise)=
1
1

Slide 7 - Slide

Review (5 min)
A hill has an angle of elevation of 25 degrees. The run is 130 meters. 
An elevator travels along the rise of the hill at a speed of 4 km/h. How long will it take to reach the top?

Slide 8 - Slide

Today's
Intended Learning Outcomes


At the end of the lesson you can...
  1. Use opposite and adjacent sides in calculations with tangent

Slide 9 - Slide

Tangent
tan()=runrise

Slide 10 - Slide

Tangent
____________________
tan()=runrise

Slide 11 - Slide

Tangent
____________________
tan()=runrise
tan()=adjacentopposite=AO

Slide 12 - Slide

Example
tan(M)=AO
tan(M)=LMKL
tan(AO)=M
1
tan(LMKL)=M
1

Slide 13 - Slide

Example





Calculate      M.
15
22

Slide 14 - Slide

(inverse) tangent





shift --> tan
gets you tan
tan()=AdjacentOpposite
tan(AdjacentOpposite)=
1
1

Slide 15 - Slide

Fill in.
In the triangle on the right,
the rule is
tan(B)=...
A
5.64.2
B
5.67
C
74.2
D
4.25.6

Slide 16 - Quiz

Calculate __A.
Round to the
nearest tenth.
A
36.9°
B
64.4°
C
53.1°
D
9.3°

Slide 17 - Quiz

Practice






Last 20 minutes: Gooseboard
Chapter 7
Math A/C
24, 26, 27, 29, 31, 32
Math B/D
23, 27, 31, 32, 34

Discuss 26 later

Slide 18 - Slide