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1. cosx=√(1-sin²x) i rownanie kwadrtowe
2. zamiana na iloczyn to Ci pokaze
sinx+cosx=0
sinx+sin(90-x)=2sin(45)*cos(x-45)=√2cos(x-45)
√2cos(x-45)=0
cos(x-45)=0
x-45=90+k*180°
x=45+90+k*180°
x=135°+k*360°
ODP
x=135°+k*360° gdzie n∈C
pozdrawiam
Hans