If cos A - sin A = 0, and 0° < A < 90° then what is the value of  \(\frac{tan^2 A}{{cos^2 A +sin A}}\)?

If cos A - sin A = 0, and 0° < A < 90° then what is the value of  \(\frac{tan^2 A}{{cos^2 A +sin A}}\)?
1). 3/√2
2). 2/(1 + √2) 
3). 2√2/(1 + √2) 
4). 2√2

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