# Sine, cosine and tangent trigonometric functions

6 videos
5 skills
In this tutorial, you will learn all the trigonometry that you are likely to remember in ten years (assuming you are a lazy non-curious, non-lifelong learner). But even in that non-ideal world where you forgot everything else, you'll be able to do more than you might expect with the concentrated knowledge you are about to get.

### Basic trigonometry

VIDEO 9:17 minutes
Introduction to trigonometry

### Example: Using soh cah toa

VIDEO 4:05 minutes
Worked example evaluating sine and cosine using soh cah toa definition.

### Trigonometry 0.5

PRACTICE PROBLEMS

### Basic trigonometry II

VIDEO 12:11 minutes
A few more examples using SOH CAH TOA

### Trigonometry 1

PRACTICE PROBLEMS

### Trigonometry 1.5

PRACTICE PROBLEMS

### Example: Trig to solve the sides and angles of a right triangle

VIDEO 7:04 minutes
Worked example using trigonometry to solve for the lengths of the sides of a right triangle given one of the non-right angles.

### Trigonometry 2

PRACTICE PROBLEMS

### Angle to aim to get alien

VIDEO 4:35 minutes

### How much of a pyramid is submerged

VIDEO 5:44 minutes

### Applying right triangles

PRACTICE PROBLEMS