Question

if f(x)=cos²x +sec²x
a. f(x)<1
b. f(x)=1
c. f(x)>_ 2
d. 2<f(x)<1​

Answer 1

Answer:

b.f(x)=1

Step-by-step explanation:

let x be any variable angle

since we know the identity

$\sin( { \alpha }^{2} ) + \cos( \alpha {}^{2} ) = 1$

therefore for any values of x.It obeys this identity.

hence,f(x)=1