1
Q
identity using sec^2(x)
A
1 + tan^2(x) = sec^2(x)
2
Q
identity using cosec^2(x)
A
1 + cot^2(x) = cosec^2(x)
3
Q
product rule (differentiation)
A
y = uv
dy/dx = u(dv/dx) + v(du/dx)
4
Q
implicit differentiation
d/dx(f(y))
A
f’(y)(dy/dx)
5
Q
implicit differentiation
d/dx(xy)
A
x(dy/dx) + y
6
Q
concave
A
local maximum
7
Q
convex
A
local minimum
