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,CesecaLove CA-ICorecaCore ct | |
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Answer» 1/SinA/1/Sin A -1 + 1/ SinA/1/SinA+1=SinA-1/SinA+ SinA+1/SinA=SinA-1/1+SinA=( SinA-1)(SinA+1)/(1+sinA)^2=Sin^2A-sina+sina-1/(cosA)^2=SinA(sin A)/cosA^2=tanA |
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