Question 9
FunctionsIf f: x → 2 tan x and g: x → √(x2 + 8), find (g o f)(45°)
- A.6
- B.3√2
- C.4
- D.2√3
Show the answer and explanation
Answer: D (2√3)
Explanation
f(45°) = 2 tan 45° = 2. Then g(2) = √(4 + 8) = √12 = 2√3.
If f: x → 2 tan x and g: x → √(x2 + 8), find (g o f)(45°)
Answer: D (2√3)
f(45°) = 2 tan 45° = 2. Then g(2) = √(4 + 8) = √12 = 2√3.