1)cosx^0=1
2)1*
3)т.к. cos^2x+sin^2x=1, то
1-sin^2x=cos^2x
4)
5)y=cosx
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1)cosx^0=1
2)1*
3)т.к. cos^2x+sin^2x=1, то
1-sin^2x=cos^2x
4)
5)y=cosx