Query 20

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course MTH 279

4/2 7pm

Query 20 Differential Equations*********************************************

Question: Using variation of parameters, solve the equation

y '' + y = sec(t), -pi/2 < t < pi/2.

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Your solution:

y_p = ln(abs(sect)cost + (2t + sin2t)/4 *sint

confidence rating #$&*:

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Given Solution:

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Self-critique (if necessary): OK

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Self-critique rating: OK

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Question: Using variation of parameters, solve the equation

y '' + 36 y = csc^3 ( 6 t ).

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Your solution:

y = -1/36 sec6t * cos6t - 1/(72sin^26t) * sin6t

confidence rating #$&*:

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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Given Solution:

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Self-critique (if necessary): OK

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Self-critique rating: OK"

&#Good work. Let me know if you have questions. &#