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TrigEatsMe

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Suppose cos(θ) =x/4. Find expressions for the other five trigonometric functions in terms of x.

In our practice problems we never had a variable x used and we were able to use the pythagorean theorem to determine the final side of the triangle and simply figure out the relationship using soh-cah-toa.

The x is throwing me off and the fact that the question doesn't specify that it's a right triangle...but perhaps that's a given since they specified that it was an angle with a cosine in the fourth quadrant?

In any case, all I've got is that sec(θ)=4/x. :(

I have a feeling there's some identity or something I should be using -- even a hint would be greatly appreciated.

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Additionally -- it does not specify whether it's a 45/45/90 or 30/60/90 triangle which would have been helpful as well.