a⋅sin(x) + b⋅cos(x) = C⋅cos(x + α)
8:27
AMC Advice for Beginners
9:04
harmonic addition theorem, example
7:44
Trigonometry : Proof of A sin x + B cos x = R sin (x + a) : ExamSolutions
13:36
My favorite proof of the n choose k formula!
6:53
harmonic addition theorem
11:03
The Derivative Equals The Square
10:37
General Solution (1 of 3: Introduction to General Solutions and finding general solution of tanx)
9:12