CAPE Pure Mathematics Unit 1 · May/June 2010 · Paper 1 · Question Q22
If x = r\sin\theta\cos\alpha, y = r\sin\theta\sin\alpha, z = r\cos\theta, then
- (A)
x^2 + y^2 + r^2 = z^2 - (B)
x^2 + y^2 + r^2 = y^2 - (C)
y^2 + z^2 + r^2 = x^2 - (D)
x^2 + y^2 + z^2 = r^2
The answer is shown once you've answered.
Practise this question