Find instantaneous rate of 6cos(3x)+2 where x=5 in radians?

How do you find instantaneous rate of 6cos(3x)+2 where x=5 in radians.

Please no calculus solutions, but from this equation: (trianglef(x))/(triangle x)

1 Answer
Dec 5, 2017

So I got the answer key today, so I will answer myself, maybe for future references for others.

Explanation:

(triangle f(x))/(triangle x)= [[6cos(3*5.01)]-[6cos(3*4.99)]]/(5.01-4.99)

(triangle f(x))/(triangle x)=~ [-2.6731108- (-2.43904)]/(0.02)

(triangle f(x))/(triangle x)=~ -11.7