Wiadomo, że dla kąta alfa jest warunek :
sinalfa * cosalfa = 1/3
Oblicz W
W=( tgalfa+1/tgalfa)2
W=( tgalfa+1/tgalfa)2=2(sinα/cosα+cosα/sinα)=2{(sin²α+cos²α)/sinα*cosα}=2*3=6
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sinalfa * cosalfa = 1/3
W=( tgalfa+1/tgalfa)2=2(sinα/cosα+cosα/sinα)=2{(sin²α+cos²α)/sinα*cosα}=2*3=6