Integral using universal substitution (Weierstrass) 

▼ IMPORTANT ▼ In this video we will see how to calculate the integral of 1 / sinx + cosx using Universal or Weierstrass substitution, that is, in the form t = tan (x / 2), completing the perfect square trinomial TCP, reaching a natural logarithm , explained step by step.
#Integrals #Calculation #Weierstrass
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** BIBLIOGRAPHY **
- Inside interesting integrals, Paul J. Nahin
- Calculus of a variable, James Stewart
- Calculus, M. Spivak
- Simplified Mathematics, by Conamat
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