1.

Find the general solution of each of the following differential equations: `(dy)/(dx)+sin(x+y)=sin(x-y)`

Answer» Correct Answer - `log|"cosec"y-coty|+2 sinx =C`
`sin(x-y)-sin(x+y)=2cos{((x-y)+(x+y))/(2)}sin{((x-y)-(x+y))/(2)}`
`=2cosx sin(-y)= -2 cosx siny.`
`therefore int (1)/(siny)dy = -2 int cosx dx rArr int "cosec"y dy = -2sinx +C`
`rArr log|"cosec"y-coty|= -2 sinx +C.`


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