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Why do we need the sum and difference formulas

1,415 views · Published 5 February 2013 · 3:46 · Indexed 26 September 2026

Channel: Brian McLogan · 2013 · Education

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👉 Learn all about the different trigonometric identities and how they can be used to evaluate, verify, simplify and solve trigonometric equations.  The identities discussed in this playlist will involve the quotient, reciprocal, half-angle, double angle, Pythagorean, sum, and difference. Identities help us rewrite trigonometric expressions

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Organized Videos:
✅ Simplify Trigonometric Identities
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpTp4TFvrmoTL5yUcea6Twx
✅ Simplify Trig Functions Using Identities
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrHW-50VYOM5BvpyJEJg8QO
✅ How to Simplify The Trigonometric Identitities by Dividing
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMr2k2DZDTCwWGpukcGIK8eh
✅ How to Simplify Trigonometric Identities by Adding and Subtracting
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqSB14sHRmGYJYYVqVMSEy8
✅ Simplify Trigonometric Identities by Factoring
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqAcfkgqr261PPsAL_5LWWa
✅ How to Simplify Trigonometric Expressions by Multiplying
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqWt8TFL_jU4aRoXF_QIsuq
✅ Learn About Trigonometric Identities
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqHYnfxqYY4PAyf1ahdb4nz

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

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👨‍👩‍👧‍👧 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/

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