Two sinusoidal waves of the same frequency travel in the same direction along a string. If `A_(1) =m 3.0 cm, A_(2) = 4.0 cm, phi_(1) = 0`, and `phi_(2) = pi//2 rad`, what is the amplitude of the resultant wave ?

Explanation

To find the amplitude of the resultant wave when two sinusoidal waves of the same frequency travel in the same direction along a string, we can use the following steps:

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Amplitude of the first wave, \( A_1 = 3.0 \, \text{cm} \)
- Amplitude of the second wave, \( A_2 = 4.0 \, \text{cm} \)
- Phase of the first wave, \( \phi_1 = 0 \)
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