Selected Trigonometric Problems
Trigonometric Problems (P2Splus Method)
$\def\frac{\dfrac}$ $\def\review{\begin{array}{|ll|}\hline\mbox{ Basic Trigonometric Identity (BT…
$\def\frac{\dfrac}$ $\def\review{\begin{array}{|ll|}\hline\mbox{ Basic Trigonometric Identity (BT…
$\begin{array}{|ll|}\hline\mbox{ Basic Trigonometric Identity (BTI) : }\\\qquad\begin{array}{rl}\…
$\def\D{\displaystyle}$ Example 1 Prove that $\D \sin^4x+\cos^4x=\frac{1}{4}(3+\cos 4x).$ $\…