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Sin, cosine, and tangent are considered the three main of trigonometry, commonly written as sin, cos, and tan.

sin(θ) = O/H

cos(θ) = A/H

tan(θ) = O/A

Where O is opposite

Where H is Hypotenuse

Where A is Adjacent

To assist further in understanding:

http://www.mathsisfun.com/sine-cosine-tangent.html

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16y ago

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