What is the probability density at the fifth carbon atom if the electron is in the n=2 energy level?

I have the formula as follows:
Probability density = p5= (2/1.65) sin^2 (4x2pi/11)
I know the final answer is 0.69 nm -1. However, I do not know how to retrieve this final answer using my calculator.. can someone help me please?

1 answer

I punched it into mine, and it worked.

Is your dRG in radians?