化简:sin(a+5π)cos(-π/2-a)·cos(8π-a)/sin(a-3π)·sin(-a-4π)
化简:sin(a+5π)cos(-π/2-a)·cos(8π-a)/sin(a-3π)·sin(-a-4π)化简:sin(a+5π)cos(-π/2-a)·cos(8π-...
化简:sin(a+5π)cos(-π/2-a)·cos(8π-a)/sin(a-3π)·sin(-a-4π)
化简:sin(a+5π)cos(-π/2-a)·cos(8π-a)/sin(a-3π/2)·sin(-a-4π) 展开
化简:sin(a+5π)cos(-π/2-a)·cos(8π-a)/sin(a-3π/2)·sin(-a-4π) 展开
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