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sugz

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## Homework Statement

8. Four wave functions are given below. Rank them in order of the magnitude of the wave

speeds, from least to greatest.

I. y(x,t) = 5sin(4x − 20t + 4)

II. y(x,t) = 5sin(3x −12t + 5)

III. y(x,t) = 5cos(4x + 24t + 6)

IV. y(x,t) =14cos(2x − 8t + 3)

(A) IV, II, I, III

(B) IV = II, I, III

(C) III, I, II, IV

(D) IV, I, II=III

(E) III, IV, II, I

## Homework Equations

## The Attempt at a Solution

I don't know how to go about this!