The Differential Equation $\frac { \partial ^ { 2 } u } { \partial x ^ { 2 } } - \frac { \partial ^ { 2 } u } { \partial y ^ { 2 } } = \sin u$

question 11

Multiple Choice

The differential equation $\frac { \partial ^ { 2 } u } { \partial x ^ { 2 } } - \frac { \partial ^ { 2 } u } { \partial y ^ { 2 } } = \sin u$ is Select all that apply.

• A) linear
• B) nonlinear
• C) hyperbolic
• D) elliptic
• E) parabolic

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