Variation of Parameters does not work here (AS SHOWN ABOVE ANSWER WILL BE INCORR

Question

Variation of Parameters does not work here (AS SHOWN ABOVE ANSWER WILL BE INCORRECT). Try using Method of Undetermined Coefficients. I tried the answer shown below, I also tried this answer: -6/5ln(cos(5t))cos((5t))+6tsin(5t). SO I TRIED 2 DIFFERENT ANSWERS, THE ANSWER WERE STILL WRONG. I'd appreciate the help.

ANSWERS THAT ARE INCORRECT: -6/5ln(cos(5t))cos((5t))+6tsin(5t) and 6/5ln(cos(5t))cos((5t))+6tsin(5t)

Entered Answer Preview Result Messages (6/5)"cos(5t)n(cos(st))+6*t*sin(st) incorrect The domain of your function doesn't match that of the - cos (5t) In(cos(5t)) 6t sin (5t 4 The answer above is NOT correct (1 point) Find a particular solution to y" + 25y 30 sec(5 Yp=1 6/5 cos(5t) In(cos(50)+6tsin(50

Explanation / Answer

yes, your Answer is right.

Correct Answer is 6/5ln(cos(5t))cos((5t))+6tsin(5t) or, -6/5ln(sec(5t))cos((5t))+6tsin(5t)

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