Trig and Complex Numbers - Multiple Angle Identities

[@MasterWuMathematics]

Links to reference videos: 1. Finding Powers of Complex Numbers using DeMoivre's Theorem: kzbin.info/www/bejne/hH2taHRqfLWKock 2​. Proof of the Sum-Difference Formulas - Part 1: kzbin.info/www/bejne/f5-Zf415pZmWhKM

[@bopaliyaharshal2399]

If we use e^(iθ) = cosθ + isinθ then cos(4θ) and sin(4θ) = ????😅🤔

[@MasterWuMathematics]

You’ll get the same results. Try it.

[@bopaliyaharshal2399]

@@MasterWuMathematics sir plz make video for integral -∞ to ∞ ∫ ( cosx ) / ( x^(2) + 1 ) dx and plz don't use Feynman's trick then how we solve this problem 🤔

[@MasterWuMathematics]

You'll have to leave this with me for now. You may have to apply a Laplace Transform to get the result. I am not a mathematics major, but rather a Mechanical Engineer. I believe math forms a very important foundation for engineering, which is why I'm making these videos - and I'm learning as I go.

[@bopaliyaharshal2399]

@@MasterWuMathematics thank u for feedback 👍