In integral calculus, there are several important rules and techniques that are commonly used to evaluate integrals. Some of the key rules include:
1. Power rule: ∫x^n dx = (1/(n+1))x^(n+1) + C, where n ≠ -1
2. Integration by parts: ∫u dv = uv - ∫v du
3. Substitution rule: ∫f(g(x))g'(x) dx = ∫f(u) du, where u = g(x)
4. Trigonometric integrals: ∫sin(x) dx = -cos(x) + C, ∫cos(x) dx = sin(x) + C, etc.
5. Exponential and logarithmic integrals: ∫e^x dx = e^x + C, ∫1/x dx = ln|x| + C, etc.
6. Partial fractions: Decomposing a rational function into simpler fractions to make integration easier.
These rules and techniques are essential for solving a wide range of integrals in calculus. By applying these rules effectively, you can simplify complex integrals and find solutions efficiently. Let me know if you have any specific questions or if you need further clarification on any of these rules!