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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

Nehushtan
2013-04-14 05:58:45

Let the angle between
and
be
. Taking the dot product gives





Then the angle between
and
is
and taking the dot product gives







Thus you can take any x, y satisfying the last equation and z such that
for example,
,
,
.

juantheron
2011-11-26 01:08:42

The vector

bisects the angle between the vectors
and
.

determine a unit vector along
.

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