[DTube] Integral of ∫sin(2x)cos(5x)dx with Product to Sum FormulasteemCreated with Sketch.

in dtube •  6 years ago  (edited)

In this video, we work through the integral of ∫sin(2x)cos(5x)dx. The first step when performing any integral is to see if we can simplify the integrand, which in this case is:

sin(2x)cos(5x)

Luckily, we can do this with a trigonometric identity called the product to sum formula:

sin(u)cos(v) = 1/2[sin(u+v) + sin(u-v)]

Thanks for watching. Please give me a "thumbs up" if you have found this video helpful.

Please ask me a maths question by commenting below and I will try to help you in future videos.

I would really appreciate any small donation which will help me to help more math students of the world. Please donate here: https://paypal.me/MasterWu

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6 years ago by

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      ·  6 years ago 

    Great to see your post but way above my head.

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      3 votes
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        ·  6 years ago 

      Thanks @stephen-somers. Hope to catch up with you and @frobear soon.

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        2 votes
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          ·  6 years ago 

        That’d be great. Maybe time for another SEQ Steemup.

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          1 vote
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            ·  6 years ago 

          I will ask my teacher about this tomorrow

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            3 votes
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              ·  6 years ago 

            Thanks @frobear. I'd love to hear your teacher's feedback!

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              1 vote
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                ·  6 years ago 

              Yuhh sometimes it is really need to refresh how solve such tasks. Thank you for this short video.

              Posted using Partiko Android

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                2 votes
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                  ·  6 years ago 

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                    ·  5 years ago 

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