Pre-Calculus - Using the sum formula for cosine to evaluate an angle cos(75) скачать в хорошем качестве

Pre-Calculus - Using the sum formula for cosine to evaluate an angle cos(75)

👉 Learn how to evaluate the cosine of an angle in radians using the sum/difference formulas. To do this, we first express the given angle as a sum or a difference of two (easy to evaluate) angles, then we use the unit circle and the Pythagoras theorem to identify the angles and obtain all the needed trigonometric function values of the angles. When we know the trigonometric function values of the two angles to be added or subtracted, we can apply the sum and difference formulas to evaluate the cosine of the given angle. 👏SUBSCRIBE to my channel here: https://www.youtube.com/user/mrbrianm... ❤️Support my channel by becoming a member:    / @brianmclogan   🙋‍♂️Have questions? Ask here: https://forms.gle/dfR9HbCu6qpWbJdo7 🎉Follow the Community:    / mrbrianmclogan   Organized Videos: ✅ Sum and Difference Formulas    • Sum and Difference Formulas   ✅ Evaluate Sum and Difference Formulas from a Triangle    • Evaluate Sum and Difference Formulas from ...   ✅ Simplify an Expression using Sum and Difference Formulas    • Simplify an Expression using Sum and Diffe...   ✅ Write the Expression as a single function | Sum and Difference Formulas    • Write the Expression as a single function ...   ✅ Verify Identities using Sum and Difference Identities    • Verify Identities using Sum and Difference...   ✅ Evaluate Tangent using Sum and Difference Formulas    • Evaluate Tangent using Sum and Difference ...   ✅ Evaluate Cosine using Sum and Difference Formulas    • Evaluate Cosine using Sum and Difference F...   ✅ Evaluate Sine using Sum and Difference of Two Angles    • Evaluate Sine using Sum and Difference of ...   ✅ Solve Equations using Sum and Difference Formulas    • Solve Equations using Sum and Difference F...   🗂️ Organized playlists by classes here:    / mrbrianmclogan   🌐 My Website - http://www.freemathvideos.com 🎯Survive Math Class Checklist: Ten Steps to a Better Year: https://www.brianmclogan.com/email-ca... Connect with me: ⚡️Facebook -   / freemathvideos   ⚡️Instagram -   / brianmclogan   ⚡️Twitter -   / mrbrianmclogan   ⚡️Linkedin -   / brian-mclogan-16b43623   👨‍🏫 Current Courses on Udemy: https://www.udemy.com/user/brianmclog... 👨‍👩‍👧‍👧 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/ #analytictrig #brianmlogan