Find the angle between the vectors (a + b & a - b) if vector |a| =vector |b|.
Find the angle between the vectors (a + b & a - b) if vector |a| = vector |b|.
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Let vector |a| = vector |b| = λ ( say)
Consider, vector (a + b ) • vector ( a - b ) = vector |a|2 - vector |b|2 = λ2 - λ2 = 0.
Therefore angle between vector (a + b ) & vector (a - b ) is 90°.
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