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Redley
Answers (1)
a. √(128/2) = 8. x=(-0.3/8)sin8t+0.05cos8t x=-0.0375sin8t+0.05cos8t b. A=+√( (0.05)^2 + ((-0.3)^2/(8)^2) ) = 0.062 sinϕ= (0.05/0.062) =0.806 cosϕ= (-0.3/0.062 *8) =-0.605 ϕtan= tan^-1 (0.806/-0.605) = tan^-1 (-1.333)=-0.927 -0.0927+π=2.217 rad x=
