Another trigonometric equation
Source: Vietnam NMO 1963 Problem 3
February 2, 2009
trigonometryalgebra unsolvedalgebra
Problem Statement
Solve the equation \sin^3x \cos 3x \plus{} \cos^3x \sin 3x \equal{} \frac{3}{8}.
Source: Vietnam NMO 1963 Problem 3