Caculus Help : Integrating with trig identities?

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SUMMARY

The discussion focuses on the integration of the function sin(2x)/(1+sin(x)). The key identities used include sin(2x) = 2sin(x)cos(x) and the Pythagorean identity (sin(x))^2 + (cos(x))^2 = 1. A successful approach involves substituting sin(2x) with 2sin(x)cos(x) and using u-substitution with u = cos(x) to simplify the integration process. The participant ultimately solved the problem after applying these techniques.

PREREQUISITES
  • Understanding of trigonometric identities, specifically sin(2x) and Pythagorean identities.
  • Proficiency in integration techniques, particularly u-substitution.
  • Familiarity with the properties of sine and cosine functions.
  • Basic knowledge of calculus, specifically integration of trigonometric functions.
NEXT STEPS
  • Practice integrating functions involving trigonometric identities, such as sin(2x)/(1+sin(x)).
  • Learn advanced u-substitution techniques for more complex integrals.
  • Explore additional trigonometric identities and their applications in calculus.
  • Study integration strategies for rational functions involving trigonometric expressions.
USEFUL FOR

Students studying calculus, particularly those focusing on integration techniques involving trigonometric functions, as well as educators seeking to enhance their teaching methods in this area.

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Homework Statement



integrate: sin (2x)/(1+sinx)



Homework Equations



(sin x)^2 + (cos x) ^2 = 1
sin (2x) = 2 sin x cos x
cos (2x) = (cos x)^2 - (sin x)^2



The Attempt at a Solution



I've been trying to integrate this thing for about an hour by rearranging various trig idenities with no luck. Am I missing something? I don't think this problem is supposed to be that hard. Someone please help!
 
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I would try first replacing sin (2x) with 2 sin x cos x then do u sub and let u = cos x. Try that and see if it helps
 
I got it now, Thanks for your help.
 

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