If θ>0 , be an acute angle , then the value of θ in degrees satisfying $\frac{\cos^{2}θ-3\cosθ+2}{\sin^{2}θ}$ =1 is

If θ>0 , be an acute angle , then the value of θ in degrees satisfying $\frac{\cos^{2}θ-3\cosθ+2}{\sin^{2}θ}$ =1 is
1). 90°
2). 30°
3). 45°
4). 60°

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