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sin(A+B)sinAcosB+cosAsinB
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sin(A-B)sinAcosB-cosAsinB
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cos(A+B)cosAcosB-sinAsinB
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cos(A-B)cosAcosB+sinAsinB
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tan(A+B)tanA+tanB/1-tanAtanB
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tan(A-B)tanA-tanB/1+tanAtanB
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sin2A2sinAcosA
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cos2A(大元)cos²A-sin²B
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cos2A(sin)1-2sin²A
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cos2A(cos)2cos²A-1
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tan2A2tanA/1-tan²A
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sin²A/21-cosA/2
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cos²A/21+cosA/2
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tan²A/21-cosA/1+cosA
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sin3A3sinA-4sin³A
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cos3A-3cosA+4cos³A
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sinAcosB1/2(sin(A+B)+sin(A-B))
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cosAsinB1/2(sin(A+B)-sin(A-B))
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cosAcosB1/2(cos(A+B)+cos(A-B))
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sinAsinB-1/2(cos(A+B)-cos(A-B))
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sinA+sinB2sin(A+B/2)cos(A-B/2)
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sinA-sinB2cos(A+B/2)sin(A-B/2)
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cosA+cosB2cos(A+B/2)cos(A-B/2)
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cosA-cosB-2sin(A+B/2)sin(A-B/2)
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