If f(x)= cos2x +sec2x then find f(x).
Answers
Answered by
1
f(x) ≥ 2 , if f(x) = Cos²x + Sec²x
Step-by-step explanation:
f(x) = Cos²x + Sec²x
Let say a = Cos²x & b = Sec²x
a & b are +ve numbers
as we know AM ≥ GM
=> (a + b)/2 ≥ ab
=> a + b ≥ 2ab
=> Cos²x + Sec²x ≥ 2Cos²x * Sec²x
=> Cos²x + Sec²x ≥ 2(Cosx * Secx)²
Cosx * Secx = 1
=> Cos²x + Sec²x ≥ 2
=> f(x) ≥ 2
Learn more:
tan x + sec x = √3 find the value of x - Brainly.in
https://brainly.in/question/4638354
Attachments:
Answered by
0
Answer:
If f(x)= cos2x +sec2x then find f(x).
Similar questions