cosα-sinα=3√ 2/5(cosα-sinα)^2 = 18/251 -2sinαcosα = 18/252sinαcosα = 1 - 8/25 = 7/25sin2α+2sin^2α/tanα= 2sinαcosα+2sin^2α/(sinα/cosα)= 2sinαcosα+2sinαcosα= 2*sinαcosα= 2*7/25= 14/25
-28/75