Nếu \(\sin \alpha  + cos\alpha  = \frac{1}{{\sqrt 2 }}\) thì \({\tan ^2}\alpha  + {\cot ^2}\alpha \) bằng

Câu hỏi :

Nếu \(\sin \alpha  + cos\alpha  = \frac{1}{{\sqrt 2 }}\) thì \({\tan ^2}\alpha  + {\cot ^2}\alpha \) bằng