Verify the identity. 1 - cos(a) sin(a) 1 - cos(a) sin(x) sin(a) 1 + cos(a) 1 - cos(α) sin(a) 1- 1 + cos(a) 1 + cos(a) (sin(a)) (1 + cos(x)) (sin(a)) (1 + cos(x)) sin(x) 1 + cos(x)

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