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Let f(x)=e^(ax)sin(bx+c)and f''(x)=r^2e...

Let `f(x)=e^(ax)sin(bx+c)`and `f''(x)=r^2e^(ax)sin(bx+theta)`,then-

A

`r=a^2+b^2`

B

`r=sqrt(a^2+b^2)`

C

`theta=c+2tan^-1""b/a`

D

`theta=2atan^-1""(b/a)`

Text Solution

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The correct Answer is:
B, C
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