Q.

 

If asin1x+cos1x+tan1xb, then

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a

a = 0

b

b=π

c

a=π4

d

b=3π4

answer is A, D.

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Detailed Solution

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Domain of fx=sin1x+cos1x+tan1x is -1.1-1.1R =-1.1 fx=sin1x+cos1x+tan1x=π2+tan1x, which is an  increasing function minimum value of fx=a=π2+tan1-1=π4 Maximum value of fx=b=π2+tan11=3π4

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