Все необходимые формулы по математике (Шпаргалка)

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n R r n=3 R=a/Ö3 r=a/(2Ö3) n=4 R=a/Ö2 r=a/2 n=6 R=a r=aÖ3/2 a/2sin(180/n) a/2tg(180/n)

cos

sin

tg

ctg

0 30 45 60 90 180 270 360 0 1/2 Ö2/2 Ö3/2 1 0 -1 0 1 Ö3/2 Ö2/2 1/2 0 -1 0 1 0 Ö3/3 1 Ö3 – 0 – 0 – Ö3 1 Ö3/3 0 – 0 –