Concise and complete guide based on the syllabus. Includes proofs/derivations. Not always useful for learning something new, but invaluable for revision for tests/final exam. Credit goes to a person I don't know by the name of Rahul Chacko.
Advanced Topics: Sequences and Series
10.1 Review of Finite Series Special Series
10.2 Maclaurin and Binomial Series
10.3 Exponential and Logarithmic Series
10.4 Sine and Cosine Series Practice
10.5 IB Style Problems
Here are some notes of Trigonometry in spanish, for those who take the subject in that language and think in this can be easier or useful.
*The notes do not belong me. I did not create them. I found them in a blog called notevuelvaslocoporelbi.blogspot.com that has not had new posts. I decided to upload the notes here because maybe they would disappear later.
Hope this is useful!