Flowerbed

Flowerbed has the shape of an isosceles obtuse triangle. Arm has a size 5.5 meters and an angle opposite to the base size is 94°. What is the distance from the base to opposite vertex?

Correct result:

h =  3.75 m

Solution:

$$\begin{gathered} \cos (94^{\circ }\mathrm{/}2)={\displaystyle \frac{h}{5.5}} \\ h=5.5\cdot \cos (94^{\circ }\mathrm{/}2)=3.75\text{ m} \end{gathered}$$

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