Question

For find the P.I. ,ehen Q is of the form sinax or cosax and F(-a2) not equal to zero then we put D =
(A) (-a2)
(B) (-a)
(C) (a2)
D) all of the above​

Answer 1

Answer:

opc is the correct answer

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

For find the P.I. when Q is of the form sinax or cosax and F( - a² ) not equal to zero then we put D² =

(A) ( - a² )

(B) ( - a )

(C) ( a² )

D) all of the above

EVALUATION

In case of finding particular integral when Q is of the form sinax or cosax and F( - a² ) not equal to zero

Then we calculate as below

$\displaystyle \sf{ = \frac{1}{f( {D}^{2} )} \sin ax }$

$\displaystyle \sf{ = \frac{1}{f( - {a}^{2} )} \sin ax }$

Hence to find the P.I. when Q is of the form sinax or cosax and F( - a² ) not equal to zero then we put D² = - a²

FINAL ANSWER

Hence the correct option is (A) ( - a² )

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