Question

If f(x) = cos2x + sec2x, then f(x)​

Answer 1

Question

if

$f(x) = \cos(2x) + \sec(2x)$

then f(x) ?

concept

$am \geqslant gm$

solution

f(x) = cos2x + sec 2x

apply concept of Am and gm

$\frac{ \cos(2x) + \sec(2x) }{2} \geqslant \sqrt{ \cos(2x) \sec(2x) }$

therefore;

$\frac{f(x)}{2} \geqslant \sqrt{1}$

$f(x) \geqslant 2$

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Answer 2

Answer:

f(x)≥2

Step-by-step explanation: