# ALEX Classroom Resource

## Ellipse Foci Review

Classroom Resource Information

Title:

Ellipse Foci Review

URL:

Content Source:

Other
Type: Learning Activity

Overview:

In this activity from Khan Academy, students will review their knowledge of the foci of an ellipse. This activity has an embedded video, practice problem with an immediate check for the correctness of the answer, an explanation option, and more practice choice at the end of the lesson. This review can be assigned to Google Classroom

Content Standard(s):
 Mathematics MA2015 (2016) Grade: 9-12 Precalculus 37 ) (+) Derive the equations of ellipses and hyperbolas given the foci, using the fact that the sum or difference of distances from the foci is constant. [G-GPE3]
Tags: ellipse, foci
For full descriptions of license types and a guide to usage, visit :
Partnered Event: ALEX Resource Development Summit

2019 ALCOS

Precalculus 37). Use trigonometric identities to solve problems.

a. Use the Pythagorean identity sin^2 (θ) + cos^2(θ) = 1 to derive the other forms of the identity.
Example: 1 + cot^2 (θ) = csc^2 (θ)

b. Use the angle sum formulas for sine, cosine, and tangent to derive the double angle formulas.

c. Use the Pythagorean and double angle identities to prove other simple identities.

This resource provided by:
 Author: YVETTE AKRIDGE The event this resource created for: ALEX Resource Development Summit