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3Thavo §6.2 Tangent
§6.2 Tangent
= Homework for today.
Let's see what the 'Tangent' of an angle means,
repeating a bit of §6.1 along the way.
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Slide 1:
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Wiskunde
Middelbare school
havo
Leerjaar 3
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15 slides
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interactive quiz
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text slides
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Lesson duration is:
50 min
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Items in this lesson
§6.2 Tangent
= Homework for today.
Let's see what the 'Tangent' of an angle means,
repeating a bit of §6.1 along the way.
Slide 1 - Slide
Slide 2 - Slide
Summarizing:
+ The Gradient of an angle and
+ The Tangent (tan) of an angle
+ are completely the same things!
Slide 3 - Slide
Homework time.
This LessonUp will be continued...
Slide 4 - Slide
In exercise 9d we read something new!
Slide 5 - Slide
This expression is used when you
+ know the tangent (or gradient) and now
+ you want to know the angle that corresponds to it
+ you key in: SHIFT TAN 0.625 =
+ the result will be the angle: 32 degrees,
+ just like you should have measured at 9c!
Slide 6 - Slide
Here is the explanation from the book:
Slide 7 - Slide
What (minor) mistake does Jonny make?
Slide 8 - Slide
Jonny's minor mistake is ...
Slide 9 - Mind map
So...
+ Jonny keyed in a rounded number
+ instead of the exact division:
+ by the way: did you notice the BRACKETS, that were used?!
1
1
7
Slide 10 - Slide
Task for comparison:
1. Key in Ranita's - not to be confused with Rinata! - input, but now without brackets!
2. Compare your answer to your answer to 10c.
3. What do you notice?
Slide 11 - Slide
Answer:
without brackets you get:
7.4427.... degrees as an answer,
which is wrong....
So: don't forget those handy fellows!
Because this really would a major mistake.
Slide 12 - Slide
Slide 13 - Slide
Homework time again.
Let's continue on the fascinating path of Maths!
Slide 14 - Slide
Math Path.
Slide 15 - Slide
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