Cosine(38) = Cos(38) = 0.788010753 ( per calculator) or 0.7880 (per Castle's Four Figure Tables).
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The cosine of 90 degrees is zero.
The cosine of 8 degrees is 0.99026806874157031508377486734485
Cosine is 0.766
The cosine of 24 degrees is 0.913
cosine(59 degrees) = 0.51504 (rounded)