help me please
时间：04-09
整理：3721RD
点击：
E=E(X^+Z^)exp(-jβr)
Θ=45
Φ=180
in the quesrion he asked to find the vector of progation β
the anser in the book is β=(x^sin45+z^cos5)
actully i got confused how he find such β
Θ=45
Φ=180
in the quesrion he asked to find the vector of progation β
the anser in the book is β=(x^sin45+z^cos5)
actully i got confused how he find such β