Jan 12, 20231 minBeautiful Sum of Sines and Cosines Formulas!Theorem Proof: The result is very reminiscent of the sum of an arithmetic series formula, 1+2+3+···+n = n(n+1)/2. We begin by writing out...
Jan 7, 20231 minGeneral Solutions of Trigonometric Equations (Radians)π rad = 180° Using radian mode on the calculator you can solve an equation and give answers either in decimals or multiples of π. For...
Jan 7, 20231 minGeneral Solutions of Trigonometric Equations (Degrees)General solution for sine Solve sin(θ)=k where -1≦k≦1 PV = Principal Value = sin⁻¹(k) Example Solve for 0≦θ≦360° the equation Taking...