Calculate tg (pi/2 -arctg(1/2)) = ?

giorgiana1976 | Student

Using the formula tg(pi/2 -k)=ctg k, we'll have:

tg[pi/2 - arctg(1/2)]=

= ctg (arctg(1/2))=1/tg(arctg(1/2))=1/(1/2)=2

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