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12+14+24+58+164+........+n=????? The answer is 3n-n2+11n-1 Please someone show me the way to solve it. ...
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If x2-x+1=0 and the two roots of the equation are α and β;then find the value of α2013+β2013. ...
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we know g=9.81 and if we calculate we should get π2=9.87.These 2 values are almost same!!!!! Why give reason??????? ...
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Proof that (tan5A+tan3A)/(tan5A-tan3A)=4cos4Acos2A ...
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If cosθ=ncos(θ+2α)then show that (n+1)tan(θ+α)=(n-1)cotα ...