please explain

correct answer without an explanation will not eam any credit. Find the derivative of f (y) - 5 sin" (26) Enclose arguments of functions in parentheses. For example, sin (2z). Include a multiplication sign between symbols, and to enter this as sin(2*x). If you want to write a power of a trigonometric function, remember that writing sin(x) to the fourth power as sin* (z) is just shorthand method. To be mathematically correct, you should write that as (sin (x) )" - which is what Mobius expects. b a sin (a)