Trigonometric Integrals by Sum and Difference Identities | Integration | Calculus | Glass of Numbers

In this video, we demonstrate how to deal with trigonometric integrals with different arguments. Since it's a product, it seems like we can try integration by parts. Actually, integration by parts will work (see link below)! But we are going to integrate this function by using the sum and difference formulas for sine, and by combining them, we obtain a product-to-sum formula which will allow us to turn this product into something that we can integrate directly.

See how to do this integral using integration by parts:

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[geoffphillips]

Just discovered you!! Very helpful and very well explained!! Thanks