tan(2π-a)cos(3π/2-a)cos(6π-a)/sin(a+3π/2)cos(a-π/2)

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tan(2π-a)cos(3π/2-a)cos(6π-a)/sin(a+3π/2)cos(a-π/2)tan(2π-a)cos(3π/2-a)cos(6π-a)/sin(a+3π/2)cos(a-π/

tan(2π-a)cos(3π/2-a)cos(6π-a)/sin(a+3π/2)cos(a-π/2)
tan(2π-a)cos(3π/2-a)cos(6π-a)/sin(a+3π/2)cos(a-π/2)