Question

Solve these 2 questions

Answer 1

and for the other question

when the resultant is perpendicular to one of the vectors(here P)

then we have the condition of

A + Bcostheta = 0

here its

P + Q costheta =0

Q cos theta = -P

there fore theta= -( cos inverse P/Q)

Answer 2

Answer:

24 - 3

25 - 2

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