A.D= R

B. D= [0 ; 1]

C. D= [-1 ; 1]

A.  $\mathrm{D}=\mathrm{ℝ}\backslash \left\{\mathrm{k}\frac{2\mathrm{\pi }}{3}|\mathrm{k}\in \mathrm{\mathbb{Z}}\right\}.$

B.  $\mathrm{D}=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{6}+\mathrm{k}2\mathrm{\pi }|\mathrm{k}\in \mathrm{\mathbb{Z}}\right\}.$

C.  $\mathrm{D}=\mathrm{ℝ}\backslash \left\{\pm \frac{\mathrm{\pi }}{6}+\mathrm{k}2\mathrm{\pi }|\mathrm{k}\in \mathrm{\mathbb{Z}}\right\}.$

D.  $\mathrm{D}=\mathrm{ℝ}$

A.

B.

C. 

D. 

A. $D = R / \left\{\frac{\mathrm{\pi }}{4} + k\frac{\mathrm{\pi }}{2}; \frac{\mathrm{\pi }}{12}+ k \frac{\mathrm{\pi }}{2}; k \in Z\right\}$

B. D = $R / \left\{\frac{\mathrm{\pi }}{6} + k\frac{\mathrm{\pi }}{2}; \frac{\mathrm{\pi }}{5}+ k \frac{\mathrm{\pi }}{2}; k \in Z\right\}$

C.  $D = R / \left\{\frac{\mathrm{\pi }}{4} + k\frac{\mathrm{\pi }}{2}; k \frac{\mathrm{\pi }}{2}; k \in Z\right\}$

D. D = $R / \left\{\frac{\mathrm{\pi }}{3} + k\frac{\mathrm{\pi }}{2}; \frac{\mathrm{\pi }}{12}+ k \frac{\mathrm{\pi }}{2}; k \in Z\right\}$

A.  $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{4}+k\frac{\mathrm{\pi }}{2},\frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{2};k\in \mathrm{\mathbb{Z}}\right\}$

B. $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{6}+k\frac{\mathrm{\pi }}{2},\frac{\mathrm{\pi }}{5}+k\frac{\mathrm{\pi }}{2};k\in \mathrm{\mathbb{Z}}\right\}$

C. $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{4}+k\frac{\mathrm{\pi }}{2},k\frac{\mathrm{\pi }}{2};k\in \mathrm{\mathbb{Z}}\right\}$

D. $D=\mathrm{ℝ}\backslash \left\{\frac{\mathrm{\pi }}{3}+k\frac{\mathrm{\pi }}{2},\frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{2};k\in \mathrm{\mathbb{Z}}\right\}$