September 2018 1 49 Report

Sprawdz nastepnujace rozsamosci:

a) cos⁴xx+sin⁴x=1-2sin²x*cos²x

b) (tgx+ctgx)²=1/(sin²x*cos²x)

c)tgx-ctgx=(tgx-1)(ctgx+1)

d)ctgx+sinx/1+cosx=1/sinx

e) (1+sinx)(1/cosx - tgx)=cosx


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