could you please explain and show the breakdown to this answer Amplitude = 2ym (cos Pi/4)...from here how do you get to the final answer below:  Amplitude =1.41ym Thank you!

Modern Physics
3rd Edition
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Chapter7: Tunneling Phenomena
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could you please explain and show the breakdown to this answer

Amplitude = 2ym (cos Pi/4)...from here how do you get to the final answer below:

 Amplitude =1.41ym

Thank you!

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