Question

Solution

Correct option is

 ab > 4 and 

             

   

             

             

as tan2 α > 0, ab > 4.

SIMILAR QUESTIONS

Q2

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

Q3
Q5

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

Q6

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

 

Q7

 

                                                              

Q8

  

    

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

Q9

 is independent of θ, then

Q10

The equation sin4 x + cos4 x = a has a real solution for