What is the simplified value of $sin^{2} (90 - \theta) - \left[\frac{sin(90 - \theta)sin\theta}{tan \theta}\right]$?

What is the simplified value of $sin^{2} (90 - \theta) - \left[\frac{sin(90 - \theta)sin\theta}{tan \theta}\right]$?
1). 1
2). $cosec\theta$
3). 0
4). $cos \theta $

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