If two vectors 2i+j+k and i+aj+3k are perpendicular to each other then

1.	If two vectors 2i+j+k and i+aj+3k are perpendicular to each other then find the magnitude of a
Answer» ANSWER: *a = -5* Explanation: Using formula :- X.Y = XY costheta X = 2i + j + k Y = I + aj + 3k X.Y = 2 + a + 3 = 5+a cos THETA = cos 90° = 0 X.Y = 0 a = -5

If two vectors 2i+j+k and i+aj+3k are perpendicular to each other then find the magnitude of a

Answer»

ANSWER:

a = -5

Explanation:

Using formula :- X.Y = XY costheta

X = 2i + j + k

Y = I + aj + 3k

X.Y = 2 + a + 3 = 5+a

cos THETA = cos 90° = 0

X.Y = 0

a = -5

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If two vectors 2i+j+k and i+aj+3k are perpendicular to each other then find the magnitude of a​

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If two vectors 2i+j+k and i+aj+3k are perpendicular to each other then find the magnitude of a