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- caseCosecocanot cote |
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Answer» 1/sin/(sin/cos+ cos/sin)= 1/sin/1/sin cos= 1/1/1/cos= cos cosecx /( tanx + cotx) = 1 / sinx / (sinx / cosx + cosx / sinx) = 1/ sinx (sinx/ cosx + cosx/simx) = 1/ sinx / (1/ sinx + cosx/ sinx)= 1/ sinx ( sinxcosx)/ sinxcosx + cosxsinx = cosx / sinxcosx+ cosxsinx = cosx/ cosx( sinx + sinx) = sinx^2 = (1- cosx^2) = 1- cosx / 1 + cosx 1/ sinx /( sinx/ cosx + cosx/ sinx) = 1/ sinx sinxcosx/)(sinxcosx+ sinxcosx) = cosx cos. x is a correct answer |
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