17.46 Use Problems
Condition: Solve the following equation by lowering the degree. \ [\ sin ^{8} x- \ cos ^{8} x = \ frac {1} {2} \ cos ^{2} 2 x- \ frac {1} \ cos 2 x \]
Problems of the Use (Unified state Exam) - Equations and Inequalites in Terms of A Parameter, Solved Both by Algebraic Methods and Geometric One.