## The Primitives of Precalculus

by Robert Curtis

# Identities - Half-Angle Identities

- P9: Trigonometric Functions:
- P9.4: Identities:
- P9.4.e: Half-Angle Identities:
- P9.4.e.1: LiveMath Notebook
- P9.4.e.2: LiveMath Help Movie

Curriculum Home with Demo Access

## Distance Calculus - Student Reviews

*Date Posted: Apr 6, 2020*

Review by: Paul Simmons

Courses Completed: Multivariable Calculus, Differential Equations

Review: I took Multivariable and Diff Eq during the summer. The DiffEq course was awesome - very useful for my physics and engineering course. I was unsure about Mathematica at first, but I got the hang of it quickly. Thank you Distance Calculus!

Transferred Credits to: University of Oregon

*Date Posted: Jan 13, 2020*

Review by: Daniel Marasco

Courses Completed: Multivariable Calculus

Review: This course was more affordable than many, and the flexible format was terrific for me, as I am inclined to work very diligently on tasks on my own. It could be dangerous for a person who requires external discipline more, but it works well for self-starters, allowing you to prioritize when you have other pressing work. I was a full time teacher adding a math certification, and this course allowed me to master the math while working around my teaching schedule and fitting work into moments here and there when I had time. I was able to transfer the credits to Montana State University, Bozeman for my teaching internship program without a hitch. The instructors were all very helpful and patient, even when I failed to see a ridiculously simple solution on one problem after 20 emails back and forth. Overall, I was more pleased with my experience in this class than I was with any of my other 9 courses.

Transferred Credits to: Montana State University, Bozeman

*Date Posted: Feb 25, 2020*

Review by: Jessica M.

Courses Completed: Applied Calculus

Review: I highly recommend this course. I started the Kennedy School at Harvard with a last-minute admission, but my application required the Liberal Arts calculus course, so I had to finish the course in 3 weeks. Diane was an awesome instructor! The class was surprisingly interesting. If you need to take calculus fast, this is the program to use.

Transferred Credits to: Kennedy School of Government, Harvard University