1.

`tan^(-1)((acosx=bsinx)/(b cosx+asinx))`

Answer» Correct Answer - -1
`=tan^(-1)(((a)/(b)-tanx)/(1+(a)/(b)tanx))="tan"^(-1)(a)/(b)-tan^(-1)(tanx)="tan"^(-1)(a)/(b)-x`


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