Rosa uses the formula open paren v sub i cosine theta close paren times triangle times t to do a calculation. Which value is Rosa most likely trying to find?

The horizontal component of the initial velocity is vᵢ cos θ. Multiplying that by time, t, gives horizontal displacement: Δx = (vᵢ cos θ)t. So Rosa is most likely finding the horizontal displacement of a projectile launched at an angle.

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