1.

The correct formula for the Fourier sine series appearing in the solution of thin airfoil theory is_____

A. A<sub>n</sub>= ( frac {2}{ pi } int_0^{ pi } frac {dz}{dx} ) cos u2061n d
B. A<sub>n</sub>= ( frac {1}{ pi } int_0^{ pi } frac {dz}{dx} ) cos u2061n d
C. A<sub>n</sub>= ( frac {2}{ pi } int_0^{2 pi } frac {dz}{dx} ) cos u2061n d
D. A<sub>n</sub>= - ( frac {1}{ pi } int_0^{ pi } frac {dz}{dx} ) cos u2061n d
Answer» B. A<sub>n</sub>= ( frac {1}{ pi } int_0^{ pi } frac {dz}{dx} ) cos u2061n d


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