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# Tan graph- a level maths watch

1. The question says to plot the graph y=tan x
I know you can draw the triangles and find out that way but is there a quicker way i can work this out :/
2. (Original post by Hannahkisley)
The question says to plot the graph y=tan x
I know you can draw the triangles and find out that way but is there a quicker way i can work this out :/
This is a graph you need to learn and you really should have learnt it at GCSE. Do you know how to draw sin/cos?
3. (Original post by Notnek)
This is a graph you need to learn and you really should have learnt it at GCSE. Do you know how to draw sin/cos?
I know the sin and cos graphs and I know what the tan graph is meant to look like, I just don’t know the values
4. (Original post by Hannahkisley)
I know the sin and cos graphs and I know what the tan graph is meant to look like, I just don’t know the values
You don't need to know specific values to sketch the tan graph. You need to know the shape and know that it repeats every 180 degrees and there are asymptotes at -90, 90, 270 etc.

Are you doing an actual question? What does the question say?
5. (Original post by Notnek)
You don't need to know specific values to sketch the tan graph. You need to know the shape and know that it repeats every 180 degrees and there are asymptotes at -90, 90, 270 etc.

Are you doing an actual question? What does the question say?
Ok my mistake, it said to sketch the graph, I thought it wanted me to draw it exactly
6. just remember

tan of 0° = 0

tan of 45° = 1

tan of 90° = infinity
7. (Original post by Hannahkisley)
Ok my mistake, it said to sketch the graph, I thought it wanted me to draw it exactly
In A Level you probably won't be asked to ever draw accurate graphs, only sketches. If you need to draw a more accurate graph then you can always use your calculator to plot points (unless it's old spec C1).

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