Помогите пожалуйста.
1)1-2sin^2x+cos2x
2)1-cos2x/sin^2x
3)(1-cos2x)cig
4)cosx-sinx/cos2x-sin2x+2sin^2x
1)1-2sin^2x+cos2x
2)1-cos2x/sin^2x
3)(1-cos2x)cig
4)cosx-sinx/cos2x-sin2x+2sin^2x
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Answers & Comments
2sin^2 x/sin^2 x=sin^2 x