Diagonal BD

Find the length of the diagonal BD in a rectangular trapezoid ABCD with a right angle at vertex A when/AD / = 8,1 cm and the angle DBA is 42°

Correct answer:

u =  12.1053 cm

Step-by-step explanation:

$$\begin{gathered} d=8.1\text{ cm } \\ A=42\text{ ° } \\ \sin A=d\mathrm{/}u \\ u=d\mathrm{/}\sin A\mathrm{°}=d\mathrm{/}\sin 42\mathrm{°}=8.1\mathrm{/}\sin 42\mathrm{°}=8.1\mathrm{/}0.669131=12.105=12.1053\text{ cm} \end{gathered}$$

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