Mail - CRISTINE J... Login . instagram @ Mit STEM-a-. Find the derivative of the function. 3x RX) = 8 - tan(x) Step 1 3x The function f(x) = is a quotient, so we'll need to use the Quotient Rule, which states that 8 - tan(x) d[( x) 9 ( x)f ' ( x ) - f ( x ) g ' ( x ) dx lg(x). (9(x) ) 2 Recall that the derivative of tan(x) is sec (x) (It's important to simply memorize the derivatives of all six trigonometric functions.) sec (1) Step 2 Now, applying the Quotient Rule, we conclude that the derivative is as follows. f' ( x ) =