Trigonometric Ratios And Identities

$$ \begin{aligned} & \text { If }\left[1-\cos \left(\frac{\pi}{2}+\alpha\right)+\sin \left(\frac{3 \pi}{2}+\alpha\right)\right]^2 +\left[1-\sin \left(\frac{3 \pi}{2}-\alpha\right)-\cos \left(\frac{3 \pi}{2}+\alpha\right)\right]^2 \\ & =a+b \sin ^2\left(\frac{\pi}{4}+\alpha\right), \text { then } a^2+b^2= \end{aligned} $$