AP EAMCET Engineering 2018 Apr 24 Shift 1 Paper

Section: Mathematics

© examsiri.com

Question : 34 of 160

Marks: +1, -0

−

a

,

−

b

and

−

c

care three unit vectors such that no two of them are collinear. If

−

b

= 2 {

−

a

×(

−

b

×

−

c

)} and α is the angle between

−

a

,

−

c

and β is the angle between

−

a

,

−

b

then cos (α + β) =

√3
2
-
√3
2
1
2
-
1
2

Go to Question:

Prev Question

Next Question