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secondary 4 | A Maths
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Date Posted: 5 years ago
Views: 207
Let me know if you need detailed treatment to how to sketch sine and cosine graphs.
Can you let me know?
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Q1a to Q2c
Will do the rest later. Graph sketching such as Q2c to Q2e requires the techniques of graph sketching. There are two different but equally effective approaches to draw sine and cosine graphs.
Will do the rest later. Graph sketching such as Q2c to Q2e requires the techniques of graph sketching. There are two different but equally effective approaches to draw sine and cosine graphs.
Date Posted:
5 years ago
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Q2d to Q3d
Will start writing again soon.
Will start writing again soon.
Date Posted:
5 years ago
Ok
I still don’t know how to draw this qns 2 graph
Not understand
Not understand
Ok, will do up the explanations once I am ready.
Ok. Thank you
I mean I don’t know how to draw and don’t know how to see
I mean I don’t know how to draw and don’t know how to see
How to see the qns and how put in what number when to put in
Will write them up shortly.
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Q3e to Q4c
Date Posted:
5 years ago
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Q2a and Q2d with explanations
Date Posted:
5 years ago
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Two random examples.
For the first method of calling out essential numbers, we need the following.
1. Sine or Cosine?
2. How many cycles?
3. Where is the centre?
4. Is the graph upside down?
5. Max/Min?
Then we draw the graph.
For the second method of transformations, we need the following.
1. Graph of the basic y = sin x (the cosine case is similar)
2. Graph of y = sin bx (after factoring in the frequency b)
3. Graph of y = a sin bx (the signage of a determines whether the graph should be flipped or not, the value of a determines whether the graph is compressed or elongated)
4. Graph of y = a sin bx + c (the value of c determines whether the graph gets shifted up or down)
For the first method of calling out essential numbers, we need the following.
1. Sine or Cosine?
2. How many cycles?
3. Where is the centre?
4. Is the graph upside down?
5. Max/Min?
Then we draw the graph.
For the second method of transformations, we need the following.
1. Graph of the basic y = sin x (the cosine case is similar)
2. Graph of y = sin bx (after factoring in the frequency b)
3. Graph of y = a sin bx (the signage of a determines whether the graph should be flipped or not, the value of a determines whether the graph is compressed or elongated)
4. Graph of y = a sin bx + c (the value of c determines whether the graph gets shifted up or down)
Date Posted:
5 years ago
Graphs like this are very difficult to explain on paper only (vocal aids like classroom teaching will be more effective). But I have included the essence of the drawings. In my opinion my first method of calling out essential numbers is probably easier for you.
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