Its a ratio in a right angle triangle, cos angle = adjacent / hypotonuse.
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sin stands for sine cos stands for cosine and tan stands for tangent
The answer to the math question Cos 5t cos 3t -square root 3 2 - sin 5t cos 3t equals 0. In order to find this answer you will have to find out what each letter is.
The product is the "sum" of a multiplication math problem.
19.86 - 4.94 math problem = 14.919999999999998
.. with another math problem.... See if the question is the same or different.