Question

giúp vs

Answer 1

a: ĐKXĐ: sin x-1<>0

=>sin x<>1

=>x<>pi/2+k2pi

TXĐ: D=R\{pi/2+k2pi}

b: ĐKXĐ: sin x+1<>0

=>sinx<>-1

=>x<>-pi/2+k2pi

TXĐ: D=R\{-pi/2+k2pi}

c: ĐKXĐ: x-pi/3<>kpi

=>x<>kpi+pi/3

TXĐ: D=R\{pi/3+kpi}