Question

What in words would be the definitions of sin 0, cos 0, and tan 0? (in words)

Answer 1

That depends upon whether the "0" is zero or the Greek symbol theta. Theta is the measure of some angle. Sine, cosine and tangent, which are abbreviated sin, cos and tan, are functions of that angle. They are the ratios of side lengths in a right triangle with one acute angle called theta.