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`tan^(-1)""[(a cos x -b sinx)/(b cosx+a sinx)]` को सरल कीजिए, यदि `""(a)/(b)tanx le-1`

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`tan^(-1)""[(a cos x -b sinx)/(b cosx+a sinx)]` को सरल कीजिए, यदि `""(a)/(b)tanx le-1`
A. `tan^(-1)((b)/(a))+x`
B. `tan^(-1)((b)/(a))-x`
C. `tan^(-1)((a)/(b))+x`
D. `tan^(-1)((a)/(b))-x`
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