Найти область определения функции:
1) f(x)=cos√(x+2)/(x-2);
2) f(x)=√1+sinx
3) f(x)=√sin^2x-cos^2x
4)f(x)=1/tg(2px^2)
5) f(x)=px+3/tg^2(x/2)
Срочно!
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