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The function f(x)=(asinx+b cosx)/(c sinx...

The function `f(x)=(asinx+b cosx)/(c sinx+d cos x)` is decreasing, if

A

`ad - bc lt 0`

B

`ad - bc gt 0`

C

`ab - cd lt 0`

D

`ab - cd gt 0`

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The correct Answer is:
A
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DISHA PUBLICATION-APPLICATION OF DERIVATIVES -EXERCISE - 1
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  9. The function f(x)=x^(1//x) is increasing in the interval

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