September 2018 1 15 Report

Proszę o pomoc w rozwiązaniu :

a) cosx=sin2x+cos3x

b ) sin5x+sin3x=sin4x

c ) 3tg²x -1/cos²x =5

d ) sinx +cos²x= 1/4

e ) 2cosx+3=4cos x/2


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