This is what I learned about Vectors. Trigonometry is a very important part when it comes to vectors. I learned about SOH CAH TOA, and how to apply them in physics problems. I learned that the triangle must be a right triangle in order to apply SOH, CAH, or TOA. I also learned that θ is the angle at point A, as shown in the figure. O stands for opposite, A stands for adjacent, and H stands for hypotenuse. Depending on the information given, I learned to apply SOH CAH TOA to find the missing side. I also learned about vector components. I learned that a force on the y-axis and a force on the x-axis, creates a resultant force. This resultant force can be at any of the 360 angles, and in any of the four quadrants on a coordinate plane. Another part of vectors that I learned is vector addition. I learned that the resultant is found by the Pythagorean theorem, and the direction, otherwise known as θ is found by tan^-1(|b|/|a|). Also, I learned vector addition through the component method. You find the x component and the y component then you use the Pythagorean theorem to find the resultant and the same formula above to find theta, except instead of b you use the y component and instead of a you use the x component. Vectors are very interesting, and that is all that I learned about them!