Proof of three trigonometric identities 🔥 sin 3x, cos 3x and tan 3x 🔥 by скачать в хорошем качестве

Proof of three trigonometric identities 🔥 sin 3x, cos 3x and tan 3x 🔥 by

Hey Students!!! 🧑‍🎓 🥳 🤠 👏 👩‍🎓 In this tutorial you will learn the proof of three very important trigonometric identity: 1) sin 3x = 3 sin x - 4 sin³ x 2) cos 3x = 4 cos³ x - 3 cos x 3) tan 3x = (3 tan x - tan³ x) /(1 - 3 tan²x). where x, 3x ≠ (2n + 1) π/2, n is an integer or x, 3x ≠ nπ + π/2, n is an integer There are actually two conditions regarding the angles for the third identity. In this tutorial I have explained and mentioned the other equally important condition about the angle x as well. Hope this will help students understand such questions better. This identity can also be written as 1) sin 3θ = 3 sin θ - 4 sin³ θ 2) cos 3θ = 4 cos³ θ - 3 cos θ 3) tan 3θ = (3 tan θ - tan³ θ) /(1 - 3 tan²θ). where θ, 3θ ≠ (2n + 1) π/2, n is an integer or θ, 3θ ≠ nπ + π/2, n is an integer or 1) sin 3theta = 3 sin theta - 4 sin³ theta 2) cos 3theta = 4 cos³ theta - 3 cos theta 3) tan 3theta = (3 tan theta - tan³ theta) /(1 - 3 tan²theta). where theta, 3theta ≠ (2n + 1) π/2, n is an integer or theta, 3theta ≠ nπ + π/2, n is an integer 00:00 What' in it 00:31 Proof of sin 3x = 3 sin x - 4 sin³ x 03:45 Proof of cos 3x = 4 cos³ x - 3 cos x 06:36 Proof of tan 3x = (3 tan x - tan³ x) /(1 - 3 tan²x) 10:13 About the restricted angles #trigonometry #trigonometricidentities #mathsbysunilsir #mathsbysunilsyal #maths #class11maths #class11mathematics #highermathematics #advancedmaths #class12mathematics #class12maths #mathsinhindi #class11mathsinhindi #class12mathsinhindi #trigonometricfunctions #trigonometricformula #identitiesofsine #identitiesofcosine #sinandcos #tan2x #identitiesoftan Website: https://www.mathemafia.com/ Subscribe:    / @mathemafia   Facebook: https://www.facebook.com/Mathemafia-1...