Mathematics · Partial Differential Equations
If u = φ(x, t) is a solution to the wave equation utt = 4uxx for t > 0, -∞ < x < ∞, with initial conditions u(x, 0) = cos(x) and ut(x, 0) = -sin(x), then find the value of φ(π2, π4).
- 11
- 2-12✓
- 312
- 40
Correct answer
-12
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