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Q.

Let x denote that largest integer x. If the number of solutions of 

sinx4cos2x=2+x-x1-x+x is k,then for xπ4,π3, the value of ktan2x

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a

1

b

lies in between 21 and 23

c

0

d

lies in between 123 and 12

answer is C.

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Detailed Solution

sinx4cos2x=2+x-x1-x+x sinx2 cosx=2+x1-x       xπ4,π3

Question Image

2sinx cosx=2+x1-x sin2x=2+x1-x no solution k=0 ktan2x=0

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