bac-s-maths 2014 Q4

bac-s-maths · France · asie Vectors 3D & Lines Vector Algebra and Triple Product Computation
In space, with respect to an orthonormal coordinate system, we consider the points $\mathrm { A } ( 1 ; - 1 ; - 1 )$, $\mathrm { B } ( 1 ; 1 ; 1 ) , \mathrm { C } ( 0 ; 3 ; 1 )$ and the plane $\mathscr { P }$ with equation $2 x + y - z + 5 = 0$.
A measure of the angle $\widehat { \mathrm { BAC } }$ rounded to the nearest tenth of a degree is equal to : a. $22,2 ^ { \circ }$ b. $0,4 ^ { \circ }$ c. $67,8 ^ { \circ }$ d. $1,2 ^ { \circ }$ 
In space, with respect to an orthonormal coordinate system, we consider the points $\mathrm { A } ( 1 ; - 1 ; - 1 )$, $\mathrm { B } ( 1 ; 1 ; 1 ) , \mathrm { C } ( 0 ; 3 ; 1 )$ and the plane $\mathscr { P }$ with equation $2 x + y - z + 5 = 0$.

A measure of the angle $\widehat { \mathrm { BAC } }$ rounded to the nearest tenth of a degree is equal to :\\
a. $22,2 ^ { \circ }$\\
b. $0,4 ^ { \circ }$\\
c. $67,8 ^ { \circ }$\\
d. $1,2 ^ { \circ }$
Paper Questions
Q1 Q2 Q3 Q4