37. 已知a→=(cosα,sinα)\overrightarrow{a}=(\cos \alpha ,\sin \alpha )a=(cosα,sinα),b→=(cosβ,sinβ)\overrightarrow{b}=(\cos \beta ,\sin \beta )b=(cosβ,sinβ),0<β<α<π0<\beta <\alpha <\pi0<β<α<π.(1)若∣a→−b→∣=2\vert \overrightarrow{a}-\overrightarrow{b}\vert =\sqrt{2}∣a−b∣=2,求证:a→⊥b→\overrightarrow{a}\bot \overrightarrow{b}a⊥b;(2)设c→=(0,1)\overrightarrow{c}=(0,1)c=(0,1),若a→+b→=c→\overrightarrow{a}+\overrightarrow{b}=\overrightarrow{c}a+b=c,求α\alphaα,β\betaβ的值.