Question

What is the projection of a= 2i - j + k on x-axis ​

Answer 1

Answer:

A = 2i-2j-k

B = i + j

R = A+B = 2i -2j- k + i +j = 3i -j -k

*Projection of R along X axis = R cosα i

= ( R.i) i/1² = 3 i

*Projection of a on b is ( a. b) b/ b²

Answer 2

Step-by-step explanation:

Note: Bold letters represent vectors.

A = 2i-2j-k

B = i + j

R = A+B = 2i -2j- k + i +j = 3i -j -k

*Projection of R along X axis = R cosα i

= ( R.i) i/1² = 3 i

*Projection of a on b is ( a. b) b/ b²