Question 7
FunctionsGiven that g: x → 3x and f: x → cos x, find the value of g o f(20°).
- A.0.50
- B.0.94
- C.2.60
- D.2.82
Show the answer and explanation
Answer: D (2.82)
Explanation
f(20°) = cos 20° ≈ 0.9397, then g gives 3 × 0.9397 ≈ 2.82.
Given that g: x → 3x and f: x → cos x, find the value of g o f(20°).
Answer: D (2.82)
f(20°) = cos 20° ≈ 0.9397, then g gives 3 × 0.9397 ≈ 2.82.