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
The derivative of negative cosine is positive sine.
Cosine = Adjacent/hypotenuse
-- 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 .