Question

​given that P+Q=R and R is perpendicular to P. If |P|=|R| , then what is the angle between P and Q?
pi/4
pi/2
3pi/4
pi
Where P,Q and R are vectors.

Answer 1

the other side of things to be able to do with the following models, the only tg, but the 4,

Answer 2

Explanation:

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