Properties of TriangleHard
Question
Let 
be a unit vector and 
is a nonzero vector not parallel to 
. The angles of the triangle, two of whose sides are represented by 
and 
are
be a unit vector and is a nonzero vector not parallel to . The angles of the triangle, two of whose sides are represented by and areOptions
A.
B.
C.
D.None
Solution
here
∠ABC = 90o
tan θ
θ = π/3
∠ABC = π/2 : ∠BAC = π/6
∠ACB = π/3
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