1.

The value of the c1 in the following equation is?i = e-37.5t(c1cos1290t + c2sin1290t) + 0.7cos(500t + π/4 + 88.5⁰).

A. -0.5
B. 0.5
C. 0.6
D. -0.6
Answer» C. 0.6


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