3

In this video I go even further into hyperbolic trigonometric identities and this time go over two corollary formulas for the cosh(2x) double angle or double argument identity which I solved in an earlier video. I show that using the famous hyperbolic trig identity cosh^{2}(x) – sinh^{2}(x) = 1 and re-arranging it as formulas of cosh^{2}(x) and sinh^{2}(x), we can then plug each formula separately into the cosh(2x) = cosh^{2}(x) + sinh^{2}(x) double identity. When we do this we can a two different corollary formulas for cosh(2x) which are also often used, and thus I wanted to solve these separately in this video. Note that “corollary” means something that follows from a previously defined or proved argument, namely the original cosh(2x) double angle identity I solved in my earlier video. This is a very interesting video in showing how any given trig identity often has multiple different useful formulations so make sure to watch this video!

Download the notes in my video: https://1drv.ms/b/s!As32ynv0LoaIhv10XnISd-9iDZq2QA

View video notes on the Hive blockchain: https://peakd.com/mathematics/@mes/video-notes-hyperbolic-trigonometric-identity-cosh-2x-corollary-1-and-2-formulas

Related Videos:

Hyperbolic Trigonometric Identity: cosh(2x) & sinh(2x): https://youtu.be/8d-CLGWFDH8

Hyperbolic Functions - tanh(x), sinh(x), cosh(x) - Introduction: http://youtu.be/EmJKuQBEdlc .

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