[" If "],[[y(alpha)=sqrt(2((tan alpha+co...

[" If "],[[y(alpha)=sqrt(2((tan alpha+cot alpha)/(1+tan^(2)alpha))+(1)/(sin^(2)alpha))],[alpha in((3 pi)/(4),pi)],[" ,then "(dy)/(d alpha)" at "alpha=(5 pi)/(6)" is "]]

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"If "y=sqrt((2(tanalpha+cotalpha))/(1+tan^(2)alpha)+(1)/(sin^(2)alpha))"when "alpha in ((3pi)/(4),pi)"then find "(dy)/(dalpha)" at"alpha=(5pi)/(6)

"If "y=sqrt((2(tanalpha+cotalpha))/(1+tan^(2)alpha)+(1)/(sin^(2)alpha))"when "alpha in ((3pi)/(4),pi)"then find "(dy)/(dalpha)" at" alpha=(5pi)/(6)

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(1)/(tan3 alpha-tan alpha)-(1)/(cot3 alpha-cot alpha)=cot2 alpha