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# Help with Tan, Cos and Sin graphs. C2 watch

1. For a Cos/Sin graph does every value between 1 and -1 have 4 corresponding angles? two negative and two positive but with the same magnitude? (E.G 270, 90, -270, -90)

And for a Tan graph does every imaginable value (as they are infinitely limited) have 4 angle values?

It makes sense in my head but i just want to make sure! a simple Yes/No would surffice
2. In a word no.

There are an infinite number of angles for each value.

In the interval degrees there might not be 4 answers e.g.
3. Its also not true to say that sin(-x) = sin(x) though this is true for cos.
So the solutions may not have the same magnitude.

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Updated: April 1, 2013
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