1.

Find the L(sin3 t).

A. ( frac{3}{4(s^2+1)}- frac{1}{4(s^2+9)} )
B. ( frac{3}{4(s^2+1)}- frac{3}{4(s^2+9)} )
C. ( frac{3}{4(s^2+1)}- frac{9}{4(s^2+9)} )
D. ( frac{3}{4(s^2-1)}- frac{3}{4(s^2+9)} )
Answer» C. ( frac{3}{4(s^2+1)}- frac{9}{4(s^2+9)} )


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