Question

  

    

are two matrices such that AB is the null matrix, then

Solution

Correct option is

cos (α – β) = 0

AB = 0

    

    

    

      

    

SIMILAR QUESTIONS

Q1

The value of the expression 

Q2

Let f (θ) = sin θ (sin θ + sin 3θ), then f (θ)

Q4

If αβ are positive acute angles and  then tan α = k tanβ such that

Q5
Q7

The maximum value of (cos α1) (cos α2) …(cos αn) under the restriction 0 ≤ α1, α1,…., α1 ≤ π/2 and (cos α1) (cos α2) …

(cos αn) = 1 is

Q8

The number of integral values of k for which the equation 7 cos x + 5 sin x = 2k + 1 has a solution is

 

Q9

 

                                                              

Q10

 is independent of θ, then