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Core 1 Question

Hey guys,

Just wondering when it asks for the equation of the normal, in relation to another line what are you exactly finding?

(If I find a past paper with the question in il add it later)

Thanks.


Posted from TSR Mobile
Original post by InsidiousMike
Hey guys,

Just wondering when it asks for the equation of the normal, in relation to another line what are you exactly finding?

(If I find a past paper with the question in il add it later)

Thanks.


Posted from TSR Mobile


All the normal is, is a line that runs 90 degrees to the tangent line.

The normal means the same thing as 'perpendicular'.

So if your given an equation of a line, e.g. y = 2x + 4

You need to work out the gradient of the perpendicular first.

The gradient is 2 from the equation above, therefore to work out the gradient of the normal, you do -1/(2) , with the denominator being the gradient of the line you were given above.

Hence the gradient of the normal = -1/2 as worked out above.

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