Solve d²y/dx²+9y =sec3x| Solve (D²+9)y=sec3x|Linear Differential Equation with Constant Coefficient

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Sir last step ka second terms se jo 1/6i multiply hua . To unha se i kanha gaya

Khuntia
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sir second i bhi cancel ho jayega na 6i s ...aapne kia nhi

Mahiic
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sir can you explain me how (1-itan3x) dx came. from

acygengaming
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wrong answer, u haven't cancelled iota in one step.

gchzkcc
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worst explanaion. unnecessary re omitting of the steps

krishnamohan