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Sine is the opposite over the hypotenuse; cosine is the adjacent over the hypotenuse; and tangent is the opposite side over the adjacent side....

Shmoop saw the sine. Want to pull an Oliver Twist and ask us for more? We've gotcha covered. Head over to /video/math/ for more mathy goodness. No...

It's the sine! No, it's the tangent! No, it's the cosine! Alright, so maybe evaluating trigonometric functions isn't as exciting as spotting Superm...

The law of sines is all about proportions, so make sure to keep yours in order.

The law of cosines allows you to find angle measurements if you have the side lengths. You know, in case you run into that situation on Saturday ni...