Trigonmetric integrals and substitutions

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SUMMARY

The discussion focuses on solving the integral of 83/((x^2)(100x^2-121)^(1/2)). The participants suggest using trigonometric substitutions, specifically the secant substitution, to simplify the integral. The initial substitution proposed is 11*u/10=x, which helps in transforming the integral into a more manageable form involving 1/(u^2*sqrt(u^2-1)). This approach effectively utilizes the relationship between secant and tangent functions to facilitate the integration process.

PREREQUISITES
  • Understanding of trigonometric identities, specifically 1 + (tanx)^2 = (secx)^2.
  • Familiarity with integral calculus and techniques for solving integrals.
  • Knowledge of substitution methods in integration.
  • Ability to manipulate algebraic expressions involving square roots.
NEXT STEPS
  • Study trigonometric substitutions in integral calculus, focusing on secant and tangent functions.
  • Practice solving integrals involving square roots and rational functions.
  • Learn about the properties of secant and tangent functions in relation to their derivatives.
  • Explore advanced integration techniques, including integration by parts and partial fractions.
USEFUL FOR

Students studying calculus, particularly those tackling trigonometric integrals, as well as educators looking for effective teaching strategies in integration techniques.

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Homework Statement


integral of 83/((x^2)(100x^2-121)^(1/2))


Homework Equations


1+(tanx)^2=(secx)^2

(secx)^2-1=(tanx)^2

(x^2-a^2)^(1/2)

The Attempt at a Solution


moved 83 out of the integral tried converting the denominator to sec and then to tan, but not sure if that is right because of the 100.
 
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First substitute 11*u/10=x. Now take the 121 out of the radical and put it with your 83 (after you take the sqrt of course!). The meat of the integral is 1/(u^2*sqrt(u^2-1)). That looks like a sec substitution.
 

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