Question

The range of $f(x)=6\sin x+8\cos x+3$ is

• A. [6,8]
• B. [6,13]
• C. [-7,13]
• D. [3,6]

Answer 1

Answer: (C)

$f\left(x\right)\in \left[3-\sqrt{6^2+8^2},3+\sqrt{6^2+8^2}\right]$