Question

the least value of 4 cos^2 A + 9 sin^2 A is :

Answer 1

I think you can use here:

\[\huge \cos^2x = 1 - \sin^2x\]

Answer 2

sorry.. this s the qn : 4 cosec^2 A + 9 sin^2 A is

Answer 3

\[cosecx = \frac{1}{sinx}\]

You can use this here..

Answer 4

but how to find answer.. m nt geting it... options are
a)10
b)11
c)12
d)14