- #1
momogiri
- 52
- 0
[SOLVED] Integral of {sqrt(4-x^2)} from 0 to 2?
Can someone please explain step by step for this?
I know the answer is pi, I just don't understand the steps towards solving it
First, I'm supposed to set x = 2sin(u)
so then u = arcsin(x/2)
then somehow, {sqrt(4-x^2)} = 2cos(u)
How'd that happen? @__@
I'm really really confused!
Thanks for tolerating XD
Can someone please explain step by step for this?
I know the answer is pi, I just don't understand the steps towards solving it
First, I'm supposed to set x = 2sin(u)
so then u = arcsin(x/2)
then somehow, {sqrt(4-x^2)} = 2cos(u)
How'd that happen? @__@
I'm really really confused!
Thanks for tolerating XD