if (0,0) is the orthocentre of a triangle formed by A(cos alpha,sin alpha),B(cos beta,sin beta),C(cos gamma,sin gamma) then angle BAC is
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if (0,0) is the orthocentre of a triangle formed by A(cos alpha,sin alpha),B(cos beta,sin beta),C(cos gamma,sin gamma) then angle BAC is ☝️
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