If alpha,beta be the roots of the equati...

If `alpha,beta` be the roots of the equation `u^2-2u+2=0` and if `cottheta=x+1,` then `((x+alpha)^n-(x+beta)^n)/(alpha-beta)` is equal to (a) `((sin n theta),(sin^n theta))` (b) `((cosn theta),(cos^n theta))` (c) `((sinn theta),cos^n theta))` (d) `((cosn theta),(sintheta^n theta))`

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