Integral Calculus By Das And Mukherjee Pdf __top__ 🔥

4️⃣ TRIG INTEGRALS • Powers of sin/cos: - If odd power of sin → u = cos. - If odd power of cos → u = sin. • Both even → use identities: sin²x = (1‑cos2x)/2, cos²x = (1+cos2x)/2 • Products sin·cos → use substitution u = sin or cos.

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3️⃣ PARTIAL FRACTIONS • Proper rational function required. • Factor denominator completely. • Write A/(x‑a)+B/(x‑b)… (linear) or (Cx+D)/(quadratic) (irreducible). • Solve for constants (equate coefficients or plug‑in). 4️⃣ TRIG INTEGRALS • Powers of sin/cos: -