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

BY: @masterwu | CREATED: Jan. 30, 2019, 5:57 a.m. | VOTES: 60 | PAYOUT: $0.32 | [ VOTE ]

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

▶️ DTube ▶️ IPFS

TAGS: [ #dtube ] [ #steemstem ] [ #teamaustralia ] [ #mathematics ] [ #calculus ]

Replies

@travoved | Jan. 30, 2019, 6:07 a.m. | Votes: 2 | [ VOTE ]

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

Posted using Partiko Android

@stephen-somers | Jan. 30, 2019, 10:36 a.m. | Votes: 3 | [ VOTE ]

Great to see your post but way above my head.

@masterwu | Jan. 31, 2019, 10:38 a.m. | Votes: 2 | [ VOTE ]

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

@stephen-somers | Jan. 31, 2019, 12:53 p.m. | Votes: 1 | [ VOTE ]

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

@frobear | Jan. 30, 2019, 12:32 p.m. | Votes: 3 | [ VOTE ]

I will ask my teacher about this tomorrow

@masterwu | Jan. 31, 2019, 10:38 a.m. | Votes: 1 | [ VOTE ]

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

@steemitboard | Feb. 4, 2019, 11:49 a.m. | Votes: 0 | [ VOTE ]

Congratulations @masterwu! You have completed the following achievement on the Steem blockchain and have been rewarded with new badge(s) :

https://steemitimages.com/60x70/http://steemitboard.com/@masterwu/votes.png?201902040657You made more than 21000 upvotes. Your next target is to reach 22000 upvotes.

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@steemitboard | Aug. 15, 2019, 4:17 p.m. | Votes: 0 | [ VOTE ]

Congratulations @masterwu! You received a personal award!

https://steemitimages.com/70x70/http://steemitboard.com/@masterwu/birthday2.pngHappy Birthday! - You are on the Steem blockchain for 2 years!

You can view your badges on your Steem Board and compare to others on the Steem Ranking

Vote for @Steemitboard as a witness to get one more award and increased upvotes!
@hivebuzz | May 31, 2020, 12:16 a.m. | Votes: 0 | [ VOTE ]

Congratulations @masterwu! You have completed the following achievement on the Hive blockchain and have been rewarded with new badge(s) :

You distributed more than 39000 upvotes. Your next target is to reach 40000 upvotes.

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