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Questions  

 Let f(x)=sinx and g(x)=loge|x| . If the ranges of  the composition functions fog and gof are R1 and R2 ,  respectively, then 

a
R1={u:−1≤u<1},R2={v:−∞
b
R1={u:−∞
c
R1={u:−1
d
R1={u:−1≤u≤1},R2={v:−∞

detailed solution

Correct option is D

fx = sinx and gx=logx⇒ fogx =fgx=flogx =sinlogx ∈-1,1     since logx, range is RR1=u/ -1≤u≤1    also  , gofx =gfx=gsinx=logsinx     since 0≤sinx≤1 ⇒-∞

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