Trig Functions & Geometry
The trig functions (sine, cosine and tangent) show up everywhere that we use vectors: 2D motion, projectile motion, forces, torque, momentum and more.
In this lesson we'll review some things we need to know about trigonometry, right triangles, trig functions, the Pythagorean Theorem and a few other things.
Since vectors show up everywhere in this course, using the right triangle trig functions is something you definitely need to be familiar with.
Also, is your calculator giving you a weird answer when using the trig functions? Check whether it's set to degrees (deg) or radians (rad). In this lesson we'll answer the question, "what even is a radian?"
0
:
3
1
Trigonometry
4
:
3
2
Right triangle trig relationships
1
2
:
0
7
Inverse trig relationships
1
3
:
4
8
Radians
1
6
:
4
7
Summary
The trig functions (sine, cosine and tangent) show up everywhere that we use vectors: 2D motion, projectile motion, forces, torque, momentum and more.
In this lesson we'll review some things we need to know about trigonometry, right triangles, trig functions, the Pythagorean Theorem and a few other things.
Since vectors show up everywhere in this course, using the right triangle trig functions is something you definitely need to be familiar with.
Also, is your calculator giving you a weird answer when using the trig functions? Check whether it's set to degrees (deg) or radians (rad). In this lesson we'll answer the question, "what even is a radian?"
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