Book:Christopher Clapham/The Concise Oxford Dictionary of Mathematics/Fifth Edition/Errata

Cosine of Sum

 * compound angle formulae (in trigonometry)

Equiangular Spiral

 * equiangular spiral

Primitive of $\dfrac 1 {\sqrt {a^2 + x^2} }$

 * Appendix $7$: Integrals

Primitive of $\sqrt {a^2 - x^2}$

 * Appendix $7$: Integrals