Answer 4.3:3
From Förberedande kurs i matematik 1
| a) | \displaystyle -a | b) | \displaystyle a |
| c) | \displaystyle \sqrt{1-a^2} | d) | \displaystyle \sqrt{1-a^2} |
| e) | \displaystyle -a | f) | \displaystyle \displaystyle \frac{\sqrt{3}}{2}\sqrt{1-a^2}+\displaystyle \frac{1}{2}\cdot a |
