Medium
Find the derivative of the following function: $5 \sec x + 4 \cos x$.
- A$5 \sec x \tan x - 4 \sin x$
- B$5 \sec x \tan x + 4 \sin x$
- C$5 \sec x \tan x - 4 \cos x$
- D$5 \sec x \tan x + 4 \cos x$
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