Math, asked by adirajkale, 5 months ago

Unit vector in the direction of the vector ā= 4i+41j
+ 2K is
Options
1/(21 + 27 +E)
0 (21+27+ )
1 / (21 + 2 – E)
O 1(21-23 +7)
Clear Response​

Answers

Answered by Anonymous
8

Answer:a

=4

i

^

−3

j

^

+2

k

^

Let

b

=x

i

^

+y

j

^

+z

k

^

it masses equal angles with coordinate axes.

x

2

+y

2

+z

2

x

=cosθ

x

=cosθ

y

=

x

2

+y

2

+z

2

y

=cosθ

z

=

x

2

+y

2

+z

2

z

⇒x=y=z

∴b=x(

i

^

+

j

^

+

k

^

)

b

ˉ

∣=

3

x

2

+x

2

+x

2

=

3

⇒3x

2

=3

⇒k=±1

∴b=

i

^

+

j

^

+

k

^

orb=−(

i

^

+

j

^

+

k

^

)

Projection of

a

or

b

b

ˉ

a

.

b

3

x(4−3+2)

⇒±

3

(3)

3

Step-by-step explanation:

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