Let = + , =b_{1} +b_{2} + and = 5 + + be three sectors such that the projection castor of on is . If + is perpendicular to then is equal to:

Let = + , =b_{1} +b_{2} + and = 5 + + be three sectors such that the projection castor of on is . If + is perpendicular to then is equal to:

1 Answer - 5876 Votes

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Projection of to on = =

b_{1}+b_{2}=2 … (1)

And ( + ( . =0

5b_{1}+b_{2}=−10 … (2)

From(1)and (2) b_{1}= −3 and b_{2}=5

Then =