Answer 4.4:3
From Förberedande kurs i matematik 1
| a) | \displaystyle \left\{\eqalign{
x&=\displaystyle\frac{\pi}{6}+2n\pi\cr x&=\displaystyle\frac{11\pi}{6}+2n\pi }\right. | b) | \displaystyle \left\{\eqalign{
x&=\displaystyle\frac{\pi}{5}+2n\pi\cr x&=\displaystyle\frac{4\pi}{5}+2n\pi }\right. |
| c) | \displaystyle \left\{\eqalign{
x&=25^\circ + n\cdot 360^\circ\cr x&=75^\circ + n\cdot 360^\circ }\right. | d) | \displaystyle \left\{\eqalign{
x&=5^\circ + n \cdot 120^\circ \cr x&= 55^\circ + n \cdot 120^\circ }\right. |
