
Polar coordinates?
Find the distance between these two polar points
P1(1.3,47 degrees) and P2(3.6,62 degrees)
I know the formula to find distance is
square root R1^2+R2^22(R1R2)cos(angle 2 angle1)
But when I plug in the numbers in my calculator I get an unreal answer but checking the answer on the back of my math book I know that is incorrect.
Can anyone show me how to do this problem? (Crying)

Answer
I get 2.74578
Is that the answer that you think it should be?
When you type it in:
is your 3.6 in () when you square it?
(1.3)^2 + (3.6)^2 2(1.3)(3.6)Cos(47  62) all under the radical sign.
also is your calculator in the correct mode if you can change it?