whenever I enter the differential equation, dsolve (' D2y+100*y = 0','t') , it gives, Ccos(10t)-Csin(10t) , when it should give a + in the middle. what is wrong?

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Andrew Serrano 2019-5-4

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评论： James Tursa 2019-5-4

whenever I enter the differential equation, dsolve (' D2y+100*y = 0','t') , it gives, Ccos(10t)-Csin(10t) , when it should give a + in the middle. what is wrong?

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James Tursa 2019-5-4

C is an arbitrary constant, so + or - doesn't matter.

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whenever I enter the differential equation, dsolve (' D2y+100*y = 0','t') , it gives, Ccos(10t)-Csin(10t) , when it should give a + in the middle. what is wrong?

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whenever I enter the differential equation, dsolve (' D2y+100*y = 0','t') , it gives, Ccos(10t)-Csin(10t) , when it should give a + in the middle. what is wrong?

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