Common Core Standards
Sine is the opposite over the hypotenuse; cosine is the adjacent over the hypotenuse; and tangent is the opposite side over the adjacent side. Aha, now you see why there's an abbreviation.
Advertisement

Up Next:
Verifying Trig Identities 
Up Next:
Tangent HalfAngle Formula 
Up Next:
Special Right Triangles 
Up Next:
SOHCAHTOA 
Up Next:
Sines