已知cos(α+β)+cos(α-β)=a,cos(α+β)-cos(α-β)=b 则(1-cos4α)(1-cos4β)的值为（ ）😵猜对的我私信发我cos的人物给你
I don''t care about my position in your heart. Tired of me taking the place of your loved one''s debt. At this time my heart fell like a flower. Suddenly my vision lost its color. I know you''re not good at expressing your feelings either. Imagine your love spinning lies to get lazy. The sweet shots actually fell like falling flowers. From then on my life turned into dust. Lonely people are always accustomed to the stability of loneliness. At least our lines crossed once. It''s like standing on a bridge under the hot sun.
