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10:02
YouTube
Dan the Tutor
Double Angle and Half Angle Formulas with Examples (Trig Identities)
Explanation and examples of the double angle formulas and half angle formulas in pre-calc. All the trig identities: https://youtu.be/rNbdfWWT1K4 More videos at https://www.danthetutor.com/ Patreon Link (recurring donations): https://www.patreon.com/user?u=84517584 Paypal Link (one-time donations): https://www.paypal.com/paypalme/danthetutor
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