sin x
cos2x
2
3
Correct answer is C
sin2x1+cosx+sin2x1−cosx
sin2x(1−cosx)+sin2x(1+cosx)1−cos2x
= sin2x−cosxsin2x+sin2x+sin2xcosxsin2x
(Note: sin2x+cos2x=1).
= 2sin2xsin2x
= 2.
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