Question

The least value of 6tan²θ + 54cot²θ + 18 is

i) 54 when A.M. ≥ G.M is applied for 6tan²θ, 54cot²θ, 18

ii) 54 when A.M ≥ G.M is applied for 6tan²θ , 54cot²θ and 18 is added further. 

iii) 78 when tan²θ = cot²θ.

a. (iii) is correct

b. (i) is correct (ii) is false

c. (i) and (ii) are correct

d. none of these

Answer 1

Correct option is c. (i) and (ii) are correct