Sin(20) =
You need either a scientific calculator or Castles four figure Tables.
Using a scientific calculator
Sin ( 20 ) = 0.342020143....
Sin(20) ~ 0.3420 (4d.p.).
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You need to use a calculator or computer. The answer will depend on whether the angle is measured in degrees or radians.
you dont
Calculate the percentage that a particular sector represents of the total value. Then the angle size is 3.6 times the percentage.
use an angle finder
182 metres is 597.112861 feet
You can calculate the sine function on any scientific calculator, including the one included in Windows or other computers. Just make sure you select the correct type of angle measurement - degrees or radians, depending which you want to calculate.