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If vec(A) = 3hat(i) - 4hat(j) and vec(B)...

If `vec(A) = 3hat(i) - 4hat(j)` and `vec(B) = -hat(i) - 4hat(j)`, calculate the direction of `vec(A) + vec(B)`.

A

`tan^(-1) (4)` with + x-axis in clock wise

B

`tan^(-1) (4)` with - x-axis in clock wise

C

`tan^(-1)(4)` with +x- axis in anti clock wise

D

`tan^(-1)(4)` with -x- axis in anti clock wise

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The correct Answer is:
A
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AAKASH SERIES-MOTION IN A PLANE -Exercise -II
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  13. The direction cosines of a vector vec(A) are cos alpha = (4)/(5sqrt(2)...

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  14. Let vec(A) = (hat(i) + hat(j)) and, vec(B) = (2hat(i) - hat(j)). The m...

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  16. If vectors vec(A) and vec(B) are 3hat(i) - 4hat(j) + 5hat(k) and 2hat(...

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