This is on my homework sheet. Still can't figure it out :S... Help? Find L-D to 5 Decimal Places: - Donny
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Looking at the bottom triangle, you can see that: $\displaystyle \cos 50^{\circ} = \frac{\text{LD}}{\text{LR}} = \frac{\text{LD}}{80 \text{ cm}}$ Assuming you can use a calculator, then: $\displaystyle \text{LD} = 80 \text{ cm} \times \cos 50^{\circ}$
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