Autoplay Next video from Max length
Using a 45 45 90 triangle evaluate trig functions

3,520 views · Published 13 January 2012 · 5:03 · Indexed 21 October 2026
Channel: Brian McLogan · 2012 · Education
👉 Learn how to evaluate the six trigonometric functions given a right triangle. A right triangle is a triangle with 90 degrees as one of its angles. A right triangle is made up of two legs, which formed the sides of the 90 degrees angle and the hypothenuse.

When the side lengths of a right triangle is known, we can use the SOHCAHTOA principle to evaluate the trigonometric functions of any of the other angles of the right triangle. When one of the side lengths of the right triangle is unknown, we can use the Pythagoras' theorem to evaluate the unknown side before evaluating the trigonometric functions.

👏SUBSCRIBE to my channel here:  https://www.youtube.com/user/mrbrianmclogan?sub_confirmation=1

❤️Support my channel by becoming a member: https://www.youtube.com/channel/UCQv3dpUXUWvDFQarHrS5P9A/join

🙋‍♂️Have questions? Ask here: https://forms.gle/dfR9HbCu6qpWbJdo7

🎉Follow the Community:  https://www.youtube.com/user/MrBrianMcLogan/community 

Organized Videos:
✅ Evaluate the Trigonometric Functions With Triangles
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpL-gBoO-oUcgfESuGouwt1
✅ Evaluate Trig Functions Using Special Right Triangles
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqeZEkcEqjW4ULIDrp3Tv9b
✅ Evaluate the Six Trig Functions Given Right Triangle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMr1UW78F2In_OGR3MaaJ4ym
✅ Evaluate the Six Trig Functions Given Equations
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpICVpjVGcVH9RQxh4rrpTK
✅ Evaluate Trig Functions from a point | Learn About
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMruA-hHsUBqd9w9MZnna8Uo
✅ Evaluate the six Trig Functions given a point
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrGKkeI5vnQ2ygIh_UIKUF1
✅ Determine the Quadrant Given Constraints
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrEMHVH_uzY3J_yYZbd6Wfc
✅ Evaluate the trigonometric function with constraint
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMonO8-XMTKTlKXqK2-7xQiG

🗂️ Organized playlists by classes here: https://www.youtube.com/user/MrBrianMcLogan/playlists

🌐 My Website - http://www.freemathvideos.com

🎯Survive Math Class Checklist: Ten Steps to a Better Year: https://www.brianmclogan.com/email-capture-fdea604e-9ee8-433f-aa93-c6fefdfe4d57

Connect with me:
⚡️Facebook - https://www.facebook.com/freemathvideos
⚡️Instagram - https://www.instagram.com/brianmclogan/
⚡️Twitter - https://twitter.com/mrbrianmclogan
⚡️Linkedin - https://www.linkedin.com/in/brian-mclogan-16b43623/

👨‍🏫 Current Courses on Udemy: https://www.udemy.com/user/brianmclogan2/

👨‍👩‍👧‍👧 About Me: I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips. Find more here: https://www.freemathvideos.com/about-me/

#trigonometry #brianmclogan
Using a 45 45 90 triangle evaluate trig functions

More from this channel
