The cosine of 60 degrees is 0.5
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It is cosine*cosine*cosine.
Cos(60) = -0.95241 assuming that angles are measured in radians, as would be done by most mathematicians. If they are measured in degrees, the answer is 0.5
Cosine = Adjacent/hypotenuse
The derivative of negative cosine is positive sine.
-- 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 .