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Math Help - Vectors

  1. #1
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    Vectors

    Find u times v if ||u|| = 10, ||v|| = 25, and the angle between u and v is pi/6
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  2. #2
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    Scalar Product

    Hello jordangiscool
    Quote Originally Posted by jordangiscool View Post
    Find u times v if ||u|| = 10, ||v|| = 25, and the angle between u and v is pi/6
    I assume you mean the scalar, or dot, product of the vectors. In which case, you need the formula

    \vec{u}.\vec{v} = |\vec{u}||\vec{v}|\cos\theta, where \theta is the angle between the vectors.

    |\vec{u}|=10,|\vec{v}|=25,\cos(\tfrac{\pi}{6})= \frac{\sqrt3}{2}, so ...

    You finish up.

    Grandad
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