1.

IFalpha, betaand gammaareanglessuchthattan alpha+ tanbeta+ tangamma=tanalphatan betatangammaandx=cosalpha+ i sinalpha, y = cosbeta +i sinbetaandz= cosgamma+ i sin gamma, thenxyz =

Answer»

1, butnot -1
`-1 ` but NOT1
`+1` or -1
`0`

ANSWER :B


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