Which expression will complete the proof?

a. cos(k0 - 0) + i sin(k0 - 0)
b. cos(k0 - 0) + i sin(k0+ 0)
c. cos(k0 + 0) + i sin(k0 - 0)
d. cos(k0 + 0) + i sin(k0 + 0)

Which expression will complete the proof a cosk0 0 i sink0 0 b cosk0 0 i sink0 0 c cosk0 0 i sink0 0 d cosk0 0 i sink0 0 class=

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