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trig

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find the math product of u and v
u= (6,7)
v= (-3,9)

  • trig - ,

    Could be a dot product (scalar product) or could be a vector product (cross product)

    If a dot product then
    6*-3 + 7*9 = 45

    If a cross product then
    i j k
    6 7 0
    -3 9 0 do determinant

    k (6*9 -(7*-3) ) = k (54+21) = 75 in z direction

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