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Question

The general solution of tanxsinx=1tanxsinx

A
x=nπ+π4x=nπ+(1)n(π2)
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B
x=nπ4π4x=nπ+(1)n(π2)
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C
x=nπ+π4
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D
x=nπ+π6x=nπ+(1)n(π2)
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Solution

The correct option is A x=nπ+π4x=nπ+(1)n(π2)
tanxsinx=1tanxsinx
sinxcosxsinx=1sinxcosxsinx
sinxsinxcosx=cosxsin2
sinx+sin2x=cosx+cosxsinx
sinx(1+sinx)=cosx(1+sinx)
(sinxcosx)(1+sinx)=0
sinxcosx=0|sinx=1=sin(π2)
tanx=1 | x=nπ+(1)n(π2)
tanx=tanπ4
x=nπ+π4
OR
tanx+tanxsinx=1+sinx
tanx(1+sinx)=1+sinx
(1+sinx)(tanx1)=0
sinx=1Or tanx=1
x=nπ+(1)n(π2) x=nπ+π4

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