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जात काये ।cobs. Since 1casua since |
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Answer» ( cosx - sinx/ cosx+ sinx)= ( cosx-sinx/ cosx+ sinx x cosx + sinx/ cosx+ sinx)= ( cosx^2- sinx^2/ ( cosx × sinx)^2= . ( cosx^2- sinx^2- cos2x; ( cosx+ sinx)^2- cosx^2-2sinxcosx+ sinx^2-1+ sin2x, cosx - sinx/cos+ sinx= cos2x/1+sin2x please like my answer |
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