Математика, Детальна інформація

ctg x = m

x = arcctg m +(k

sin x/2 = 2t/(1+t2); t - tg

cos x/2 = (1-t()/(1+t()

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( + ( + ( =180

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a( = b(+c( - 2bc cos (

b( = a(+c( - 2ac cos (

c( = a( + b( - 2ab cos (

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Oi\x00F0ioea Aa\x00F0iia :

p=((a+b+c)

_____________

S = (p(p-a)(p-b)(p-c)

S = (ab sin (

S\x00F0aai.=(a((3)/4

S = bh/2

S=abc/4R

S=pr

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S = (a+b)/2( h

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