Ctg(a+pi) + 4tg((3pi/2)-a)+2tg (a+(5pi/2)) если ctga =-0.25

Question

Ctg(a+pi) + 4tg((3pi/2)-a)+2tg (a+(5pi/2)) если ctga =-0.25

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Answer 1

= ctg α + 4ctg α - 2ctg α = 3ctg α = 3·(-0,25) = -0,75