1.
If α=sin1(13)+sin1(1?)\alpha = \sin^{-1}\left(\frac{1}{3}\right) + \sin^{-1}\left(\frac{1}{?}\right) and β=cos1(??)+cos1(??)\beta = \cos^{-1}\left(\frac{?}{?}\right) + \cos^{-1}\left(\frac{?}{?}\right), then