0.866 ( or (sqrt 3)/2 )
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The cosine of 60 degrees is 0.5
-- If the "14" is degrees, then the cosine is 0.970 . -- If the "14" is radians, then the cosine is 0.137 . -- If the "14" is grads, then the cosine is 0.976 .
cosine(28 degrees) = 0.88295 (rounded) cosine(28 radians) = -0.96261 (rounded)
Cosine of 90 degrees is zero.
0.8192