- #1
diewlasing
- 14
- 0
how do I show that:
|y + x|^2 = |y|^2 + |x|^2 + 2|yx|cos(a1-a2)
where y = |y|exp(ia1)
and
where x = |x|exp(ia2)
and how do I show that |exp(z)| = exp(Re(z)) where Re is the real part of an imaginary number z.
thanks is advance
|y + x|^2 = |y|^2 + |x|^2 + 2|yx|cos(a1-a2)
where y = |y|exp(ia1)
and
where x = |x|exp(ia2)
and how do I show that |exp(z)| = exp(Re(z)) where Re is the real part of an imaginary number z.
thanks is advance