#Python, 135 130 bytes

from random import*
def r():return uniform(-1,1)
p=[]
while not p:
    x,y=r(),r()
    if x**2+y**2<=1:p=x,y
print'(%.2f, %2f)'%p

Removed the **0.5 thanks to @jimmy23013’s suggestion (because it is a unit circle, I am now checking whether the distance squared between (x, y) and (0, 0) is equal to 1². This is the same thing).

This also freed me to remove the parentheses.

Python, 135 130 bytes

from random import*
def r():return uniform(-1,1)
p=[]
while not p:
    x,y=r(),r()
    if x**2+y**2<=1:p=x,y
print'(%.2f, %2f)'%p

Removed the **0.5 thanks to @jimmy23013’s suggestion (because it is a unit circle, I am now checking whether the distance squared between (x, y) and (0, 0) is equal to 1². This is the same thing).

This also freed me to remove the parentheses.

#Python, 135 130 bytes

from random import*
def r():return uniform(-1,1)
p=[]
while not p:
    x,y=r(),r()
    if x**2+y**2<=1:p=x,y
print'(%.2f, %2f)'%p

Removed the **0.5 thanks to @jimmy23013’s suggestion (because it is a unit circle, I am now checking whether the distance squared between (x, y) and (0, 0) is equal to 1². This is the same thing).

This also freed me to remove the parentheses.

#Python, 135 130 bytes

from random import*
def r():return uniform(-1,1)
p=[]
while not p:
    x,y=r(),r()
    if x**2+y**2<=1:p=x,y
print'(%.2f, %2f)'%p

Removed the **0.5 thanks to @jimmy23013’s suggestion (because it is a unit circle, I am now checking whether the distance squared between (x, y) and (0, 0) is equal to 1². This is the same thing).

This also freed me to remove the parentheses.

#Python, 135 bytes

from random import*
def r():return uniform(-1,1)
p=[]
while not p:
    x,y=r(),r()
    if(x**2+y**2)**0.5<=1:p=x,y
print'(%.2f, %2f)'%p

#Python, 135 130 bytes

from random import*
def r():return uniform(-1,1)
p=[]
while not p:
    x,y=r(),r()
    if x**2+y**2<=1:p=x,y
print'(%.2f, %2f)'%p

Removed the **0.5 thanks to @jimmy23013’s suggestion (because it is a unit circle, I am now checking whether the distance squared between (x, y) and (0, 0) is equal to 1². This is the same thing).

This also freed me to remove the parentheses.