1.

If x = sint , y = cos pt , then

Answer»

`(1-x^2)y_2+xy_(1)+p^2y=0`
`(1-x^2)y_2+xy_(1)-p^2y=0`
`(1-x^2)y_2 -xy_(1)-p^2y=0`
`(1-x^2)y_2-xy_(1)+p^2y=0`

ANSWER :D


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