Q. Use as substitution to find: {Intergration symbol} sin(3 + 2x) . dx if U = 2x + 3 then du = 2. dx = 1/2 {Intergration symbol} sin (U) . du = - cos (U) / 2 + c = - 1/2 . cos (2x + 3) + c Not sure the method is correct?
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Originally Posted by Parton-Bill Q. Use as substitution to find: {Intergration symbol} sin(3 + 2x) . dx if U = 2x + 3 then du = 2. dx = 1/2 {Intergration symbol} sin (U) . du = - cos (U) / 2 + c = - 1/2 . cos (2x + 3) + c Not sure the method is correct? Perfectly done. You are correct.
Originally Posted by Parton-Bill Q. Use as substitution to find: {Intergration symbol} sin(3 + 2x) . dx if U = 2x + 3 then du = 2. dx = 1/2 {Intergration symbol} sin (U) . du = - cos (U) / 2 + c = - 1/2 . cos (2x + 3) + c Not sure the method is correct? Answer is good. Best way to check is find
thank you very much guys, I really struggle with my confidence in regards to calculus, so feedback, especially encourageing feedback is an essentail part of building my confidence. thanks again
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