Today we looked at the other two trigonometric ratios: sine and cosine ratios. These three ratios (along with tangent) can help you find the length of a missing side of a right triangle. After break we will look at how to solve for missing angle measures as well.
Tonight's homework is P. 477-478 #5,9,16,18,19, and 29.
Try this animation on angles of depression for an application of the sine and cosine ratios.
http://www.classzone.com/cz/books/geometry_2007_na/resources/applications/animations/geom07_ch07_pg475.html
ms. berger, I think I found something about law of tangents someone in class asked. It looks kind of confusing though. http://mathworld.wolfram.com/LawofTangents.html
ReplyDelete(i can't make a hyper-link but high-lite and then right click on the above)