Find the missing length of a triangle using the cosine function

👉 Learn how to find a missing side length of a right triangle. A right triangle is a triangle that has 90 degrees as one of its angles. The trigonometric identities of right triangles give us the relationship between the angles of a right triangle and the side lengths of the right triangle. These trigonometric identities, commonly called SOHCAHTOA, are: sin x = opposite / hypothenuse; cos x = adjacent / hypothenuse and tan x = opposite / adjacent. These identities enable us to find a missing side length of a right triangle given one of the side lengths and one of the other angles of the right triangle.

Organized Videos:
✅Right Triangles
✅Find The Angle of a Right Triangle
✅Solve Word Problems with Right Triangles
✅Find The Missing Side of a Right Triangle
✅Right Triangle Trigonometry | Learn About
✅Missing Side of Special Right Triangles

Connect with me:

#righttriangles #brianmclogan

[eddierocha]

Even after 8 years he still helps solve problems

[skull]

Man this is so helpful, I don't pay any attention in math class, so this is short and gets straight to the point thankyou so much, now I wont fail math.

[kevinkeane]

How is 4 minutes better than a week of online school

[jediknight]

thanks! I finally understand the "sin cos and tan" on the calculators😂
(I'm doing math 10 summer school this year)

[kat.ex]

I am so glad that this video went straight to it, my teachers had us do this for a whole week and I didn't understand and this person helped me in 3 mins, thank you

[Yagon-uexm]

I’m just gunna watch the video instead of paying attention in school

[musicaccount]

the fact that this literally just taught me how to do it instead of my teacher and it was 9 years ago

[MoonBro]

why is this dude the only one who shows up when i need help with geometry lol

[codyhutchison]

your videos have been so helpful through all of my Math, I love your channel!

[RaidKillerX]

I just watch his video of how to find the missing side by using sine, cosine, and tangent and it help me a lot.

[jorgef]

Im failing geonetry class with a 50 an F cuz i find this hard in class but these youtube videos help

[egreaux]

I have a question, how do you know to make the adjacent side x and not the opposite side?

[daequanhendricks]

Best video ever can’t believe this was 10 years ago thank you

[IGATECK]

I'm probably not the group of people you wanted to help but thanks anyway, now I can calculate my bullet drop when shooting downhill or uphill

[orangebetsy]

Since the opposite side of unknown length could also be called x, wouldn't sin(15) = x/10 too? Yet 9.7 doesn't seem right just looking at the triangle.

[zackschmidt]

alpha males learn trig during the exam

[ily.niaa_]

What would be the answer for the opposite side or like how to solve it?

[Kwibby]

Online school is a bad way of teaching my god, this is actually easy

[cbucks]

I spent the whole year of school not being able to understand cosine and it was this easy...

[liampenner]

I would just like to point out that he’s super close to 1 mill