Professor Marston and the Wonder Women
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- 2020 · Romance · 1 season
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Learn trigonometry—right triangles, the unit circle, graphs, identities, and more.
- Unit Circle
Search for courses, skills, and videos. Main content....
- Non-Right Triangles & Trigonometry
Trigonometric ratios are not only useful for right...
- Use ratios in right triangles
Use ratios in right triangles - Trigonometry | Khan Academy
- Right triangle trigonometry word problems
Right triangle trigonometry word problems - Trigonometry |...
- Reciprocal trig ratios
Reciprocal trig ratios - Trigonometry | Khan Academy
- Radians & degrees
Radians & degrees - Trigonometry | Khan Academy
- Use the Pythagorean identity
Use the Pythagorean identity - Trigonometry | Khan Academy
- Unit Circle
In this video, I want to give you the basics of trigonometry. And it sounds like a very complicated topic, but you're going to see that it's really just the study of the ratios of sides of triangles. The "trig" part of trigonometry literally means triangle.
- 9 min
- Sal Khan
- What do you use for the adjacent side if you're trying to figure out the sin cos and tan for the rig...Well, in beginning trigonometry, it's convenient to evaluate sin/cos/tan by using soh-cah-toa, but later, as you get into the unit circle and you s...
- How can you figure out which is the opposite or the adjacent?The opposite side is the side opposite of the angle that you are trying to solve for. The adjacent side is the side next to the angle you are solvi...
- My question is around *how* to calculate sin, cos or tan. I've pushed the sin/cos/tan button many ti...sin cos and tan are basically just functions that relate an angle with a ratio of two sides in a right triangle. Sin is equal to the side opposite...
- Why does Sal (the person talking in the video) use theta or some other greek letter for the angles i...The reason is because in the world of math (not khan academy's "world of math"), mathematicians usually use x and y for missing lengths, and use Gr...
- How do you use trigonometry on 3d and even 4d shapes and objects?Trigonometry can be applied to 3d objects. Consider you have a cube, and you know that angle from cube diagonal to diagonal of square is 45° from h...
- if the angle changes the sin and cos interchange .why?you need to understand what sin and cos are. They are trigonometric ratios. They relate an acute angle in a right triangle with two sides in the tr...
- At 1:19 what do you call the hypotenuse if it's not a right angle triangleOnly right triangles have a hypotenuse. In a scalene (non-right) triangle, they are all just called sides.
- A small question. We name the ratios as "Sine", "Cosine", "Tangent", "Cotagent", "Secant" and "Cosec...I think that's a great question! This is a pretty cool story (to me at least). The word that the Arabs used for sine was the same as their word for...
- Is hypotenuse the longest side or what?Yes, the hypotenuse is the longest side of a right triangle. It is opposite to the right angle.
People also ask
What is the theoretical value of trigonometric ratios?
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Can trigonometry be applied to 3D objects?
What are trig functions?
Using the unit circle diagram, draw a line “tangent” to the unit circle where the hypotenuse contacts the unit circle. This line is at right angles to the hypotenuse at the unit circle and touches the unit circle only at that point (the tangent point).
- 9 min
- Sal Khan
- Do these ratios hold good only for unit circle? What if we were to take a circles of different radii...The ratio works for any circle. The advantage of the unit circle is that the ratio is trivial since the hypotenuse is always one, so it vanishes wh...
- What is the terminal side of an angle?straight line that has been rotated around a point on another line to form an angle measured in a clockwise or counterclockwise direction
- I hate to ask this, but why are we concerned about the height of b? What is a real life situation in...Say you are standing at the end of a building's shadow and you want to know the height of the building. you only know the length (40ft) of its shad...
- In the concept of trigononmetric functions, a point on the unit circle is defined as (cos0,sin0)[not...[cos(θ)]^2+[sin(θ)]^2=1 where θ has the same definition of 0 above. This is similar to the equation x^2+y^2=1, which is the graph of a circle with...
- This seems extremely complex to be the very first lesson for the Trigonometry unit. He keeps using t...The problem with Algebra II is that it assumes that you have already taken Geometry which is where all the introduction of trig functions already o...
- At 2:34, shouldn't the point on the circle be (x,y) and not (a,b)? [Since horizontal goes across 'x'...It would be x and y, but he uses the letters a and b in the example because a and b are the letters we use in the Pythagorean Theorem `a²+b² = c²`...
- You should at least explain what sin and cosine are. This is intro to trigonometrysin is opposite/hypotnuse. cosine is adjacent/hypotnuse
- I'm a little confused. Can someone help explain how to use a unit circle to help solve sine, cosine,...Determine angle(theta) you are finding the cosine, sine, or tangent of. Using SOHCAHTOA in relation to theta, the angle in the math equation you ar...
- At minute 3:00 they talk about creating a right triangle to find the hypotenuse. Will the Hypotenuse...The unit circle by definition has a radius of 1, so the hypotenuse will always be 1.
Trigonometry. > Intro to arctangent. Google Classroom. About. Transcript. Sal introduces arctangent, which is the inverse function of tangent, and discusses its principal range. Created by Sal Khan. Questions. Tips & Thanks. Want to join the conversation? Sort by: Top Voted. L. A. Wilson. 11 years ago.
