Find an equation of the tangent line to the curve y=x 3
(x 2
−5) at x=1. Write the slope of the tangent line at an arbitrary point P=(a,a 5
−5a 3
) (b) Simplify the expression for f(x)= secx
tanx−4
​
by writing in terms of sinx and cosx, and then find f ′
(x)