Question

A
, b
and c
are unit vectors such that ∣ a
+ b
+3 c
∣=4. angle between a
and b
is θ 1
​ , between b
and c
is θ 2
​ and between a
and c
varies [ 6
π
​ , 3
2π
​ ]. then the maximum value of cosθ 1
​ +3cosθ 2
​ is.

Answer 1

Answer:

attempt

yourself