Q.

If 1sin2x=cosx and 1cos2x=sinx, then 'x'lies in 

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a

Q4

b

Q1

c

Q2

d

Q3

answer is B.

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Detailed Solution

1sin2x=cosx

1cos2x=sinx

cosx is negative in Q2,Q3

sinx is positive in Q1,Q2

 it is Q2

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