$\log_{b} (x_{1}x_{2}) =$

$\log_{b} (x_{1}/x_{2}) =$

$b^{\log_{b} x} =$

$(\log_{a} b)(\log_{b} x) =$

$\log_{b} x^{n} =$

Sine/Cosine Identity

Cotangent/Cosecant Identity

Tangent/Secant Identity

$\sin (\alpha + \beta) =$

$\sin (\alpha - \beta) =$

$\cos(\alpha + \beta) =$

$\cos(\alpha - \beta) =$

$\tan(\alpha + \beta) =$

$\tan(\alpha - \beta) =$

$\sin 2\theta =$

$\cos 2\theta =$

$\tan 2\theta =$

$\sin\frac{\theta}{2} =$

$\cos\frac{\theta}{2} =$

$\tan\frac{\theta}{2} =$

Sum of Roots of a Polynomial

Product of Roots of a Polynomial