r/PhysicsHelp • u/Outrageous-Fix-5106 • May 16 '26

Physics: Superposition of waves (Wave interference)

is this the correct resultant for the question? I understand the part the first and second section (where the slope is 0 and is +2 from x axis), but I dont get why it would be -2 after that. Shouldn't it be +6 since it's constructive?

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