Question

pls send answer ........

Answer 1

Given: x=rsinθcosϕ,y=rsinθsinϕ,z=rcosθ

Now, x

2

+y

2

+z

2

= r

2

sin

2

θcos

2

ϕ+r

2

sin

2

θsin

2

ϕ+r

2

cos

2

θ

= r

2

sin

2

θ(cos

2

ϕ+sin

2

ϕ)+r

2

cos

2

θ

= r

2

sin

2

θ+r

2

cos

2

θ

= r

2

(sin

2

θ+cos

2

θ)

= r

2