No label defined (Q1171)

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    Statements

    topic-id
    B.70
    0 references
    arqmath formula id
    q_643
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    post type
    Question
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    relevant answers
    17973
    Defining formula
    sin⁡(a)sin⁡(d2)=12⋅[cos⁡(a−d2)−cos⁡(a+d2)]$$and$$sin⁡(a+d)⋅sin⁡(d2)=12⋅[cos⁡(a+d−d2)−cos⁡(a+d+d2)]
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