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Question

All possible values of θ[0,2π] for which sin2θ+tan2θ>0 lie in :

A
(0,π2)(π,3π2)
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B
(0,π4)(π2,3π4)(π,5π4)(3π2,7π4)
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C
(0,π2)(π2,3π4)(π,7π6)
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D
(0,π4)(π2,3π4)(3π2,11π6)
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Solution

The correct option is B (0,π4)(π2,3π4)(π,5π4)(3π2,7π4)

tan2θ(1+cos2θ)>0tan2θ>0 (1+cos2θ>0)
2θ(0,π2)(π,3π2)(2π,5π2)(3π,7π2)

(0,π4)(π2,3π4)(π,5π4)(3π2,7π4)

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