Which Ratio Works?

In the triangle below, which equations would work to find the side [math]x[/math]? [br](Tick all that apply)

[math]cos\left(28^\circ\right)=\frac{20}{x}[/math] [math]sin\left(28^\circ\right)=\frac{20}{x}[/math] [math]tan\left(62^\circ\right)=\frac{20}{x}[/math] [math]cos\left(62^\circ\right)=\frac{20}{x}[/math]

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Información: Which Ratio Works?