If tan(θ)=x\tan(\theta) = xtan(θ)=x, what is sin(θ)\sin(\theta)sin(θ) in terms of xxx (for acute θ\thetaθ)?
x1+x2\frac{x}{\sqrt{1+x^2}}1+x2x
11+x2\frac{1}{\sqrt{1+x^2}}1+x21
1+x2\sqrt{1+x^2}1+x2
x1−x2\frac{x}{\sqrt{1-x^2}}1−x2x