Sophia Learning
Sophia: Using Right Triangle Trigonometry to Find the Area of Regular Polygons
This lesson will demonstrate how to use right triangle trigonometry and special right triangles (45-45-90 and 30-60-90) to find the area of triangles given the side lengths of the polygon.
Sophia Learning
Sophia: Cotangent
This lesson introduces the concept of the cotangent of an angle. [2:21]
Sophia Learning
Sophia: Cosecant
The concept of the cosecant of an angle is introduced in this lesson.
Sophia Learning
Sophia: Secant: Lesson 4
This lesson introduces the concept of the secant of an angle. It is 4 of 5 in the series titled "Secant."
Sophia Learning
Sophia: Cosine: Lesson 1
The concept of the cosine of an angle is introduced here. This lesson is 1 of 4 in the series titled "Cosine." [3:01]
Sophia Learning
Sophia: Sine: Lesson 1
The concept of the sine of an angle is introduced here. This lesson is 1 of 6 in the series titled "Sine."