Pure Year 2 Unit 12 Flashcards Preview

Edexcel A Level Maths > Pure Year 2 Unit 12 > Flashcards

Flashcards in Pure Year 2 Unit 12 Deck (4)
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1
Q

Distance of the origin to the point (x, y, z) =

A

root(x^2 + y^2 + z^2)

2
Q

Distance between the points (x1, y1, z1) and (x2, y2, z2)

A

Root((x1 - x2)^2 + (y1 - y2)^2 + (z1 - z2)^2)

3
Q

How are unit vectors on the 3d axes denotes?

A

I, J, and K for x, y, and z respectively

4
Q

If the vector a = xi + yj + zk makes an angle theta with the positive x axis, how do you find it?

A

cos(thetax) = x / modulus(a)