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This cheat sheet covers the most common derivative and integral formulas used in high school calculus. Students need these formulas to recognize patterns quickly, check work, and solve problems involving rates of change and accumulation. It is especially useful for homework, test review, and building fluency before studying applications of calculus. The core idea is that differentiation and integration are inverse processes, but each has rules that must be applied carefully. Important formulas include the power rule, exponential and logarithmic rules, trigonometric rules, and inverse trigonometric integrals. Antiderivatives usually require a constant CC, while derivatives often require attention to chain rule factors such as uu'.

Key Facts

  • The power rule for derivatives is ddx(xn)=nxn1\frac{d}{dx}\left(x^n\right)=nx^{n-1} for any real number nn where the expression is defined.
  • The power rule for antiderivatives is xndx=xn+1n+1+C\int x^n\,dx=\frac{x^{n+1}}{n+1}+C for n1n\neq -1.
  • The derivative of the natural logarithm is ddx(lnx)=1x\frac{d}{dx}\left(\ln x\right)=\frac{1}{x} for x>0x>0, and 1xdx=lnx+C\int \frac{1}{x}\,dx=\ln|x|+C.
  • The exponential rules are ddx(ex)=ex\frac{d}{dx}\left(e^x\right)=e^x and exdx=ex+C\int e^x\,dx=e^x+C.
  • The basic sine and cosine rules are ddx(sinx)=cosx\frac{d}{dx}\left(\sin x\right)=\cos x, ddx(cosx)=sinx\frac{d}{dx}\left(\cos x\right)=-\sin x, cosxdx=sinx+C\int \cos x\,dx=\sin x+C, and sinxdx=cosx+C\int \sin x\,dx=-\cos x+C.
  • The tangent and secant squared pair is ddx(tanx)=sec2x\frac{d}{dx}\left(\tan x\right)=\sec^2 x and sec2xdx=tanx+C\int \sec^2 x\,dx=\tan x+C.
  • For a composite function, the chain rule is ddx(f(g(x)))=f(g(x))g(x)\frac{d}{dx}\left(f(g(x))\right)=f'(g(x))g'(x), and the matching integral idea is substitution with u=g(x)u=g(x) and du=g(x)dxdu=g'(x)\,dx.
  • Common inverse trigonometric forms include 11x2dx=arcsinx+C\int \frac{1}{\sqrt{1-x^2}}\,dx=\arcsin x+C and 11+x2dx=arctanx+C\int \frac{1}{1+x^2}\,dx=\arctan x+C.

Vocabulary

Derivative
A derivative gives the instantaneous rate of change of a function, written as f(x)f'(x) or dydx\frac{dy}{dx}.
Antiderivative
An antiderivative of f(x)f(x) is a function F(x)F(x) such that F(x)=f(x)F'(x)=f(x).
Indefinite Integral
An indefinite integral, written f(x)dx\int f(x)\,dx, represents the family of all antiderivatives of f(x)f(x).
Constant of Integration
The constant of integration CC represents all vertical shifts of an antiderivative because the derivative of any constant is 00.
Chain Rule
The chain rule differentiates composite functions using ddx(f(g(x)))=f(g(x))g(x)\frac{d}{dx}\left(f(g(x))\right)=f'(g(x))g'(x).
Substitution
Substitution rewrites an integral using u=g(x)u=g(x) and du=g(x)dxdu=g'(x)\,dx to match a simpler antiderivative rule.

Common Mistakes to Avoid

  • Forgetting the constant CC in an indefinite integral is wrong because f(x)dx\int f(x)\,dx represents a whole family of functions, not just one function.
  • Using the power rule on x1dx\int x^{-1}\,dx is wrong because the formula xndx=xn+1n+1+C\int x^n\,dx=\frac{x^{n+1}}{n+1}+C does not apply when n=1n=-1.
  • Dropping the chain rule factor is wrong because ddx(sin(3x))\frac{d}{dx}\left(\sin(3x)\right) equals 3cos(3x)3\cos(3x), not just cos(3x)\cos(3x).
  • Confusing derivative and integral signs for trigonometric functions is wrong because ddx(cosx)=sinx\frac{d}{dx}\left(\cos x\right)=-\sin x while cosxdx=sinx+C\int \cos x\,dx=\sin x+C.
  • Ignoring absolute value in logarithmic antiderivatives is wrong because 1xdx=lnx+C\int \frac{1}{x}\,dx=\ln|x|+C, which works for both positive and negative values of xx.

Practice Questions

  1. 1 Find ddx(5x43x2+7x9)\frac{d}{dx}\left(5x^4-3x^2+7x-9\right).
  2. 2 Evaluate (6x24x+1)dx\int \left(6x^2-4x+1\right)\,dx.
  3. 3 Find 2x1+x2dx\int \frac{2x}{1+x^2}\,dx using substitution.
  4. 4 Explain why every indefinite integral answer needs +C+C, even when the antiderivative formula looks complete.