Answer 4.3:6

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a) \displaystyle \sin{v}=-\displaystyle \frac{\sqrt{7}}{4}\quad och \displaystyle \quad\tan{v}=-\displaystyle \frac{\sqrt{7}}{3}\,
b) \displaystyle \cos{v}=-\displaystyle \frac{\sqrt{91}}{10}\quad och \displaystyle \quad\tan{v}=-\displaystyle \frac{3}{\sqrt{91}}\,
c) \displaystyle \sin{v}=-\displaystyle \frac{3}{\sqrt{10}}\quad och \displaystyle \quad\cos{v}=-\displaystyle \frac{1}{\sqrt{10}}\,