4 Why do we only solve for $0$ on the numerator of this fraction? 3 How to understand the rearrangement of differentials in the derivation of kinetic energy using calculus? 3 How many $0$'s are at the end of $(38!)^{20}$? 3 Simplifying a expression which involves a square root: $\sqrt{36 - 4x^2}$ 2 Solve the following equation: $\sin x \cos x = \frac{1}{2}$

### Reputation (1,448)

 +10 Why are rational functions called “rational”? +10 Algebraic proof that two statements of the fundamental theorem of algebra are equivalent +10 Efficient method for computing the product of the first 8 terms of a recursive sequence +10 Weird Number Density, confusion regarding Wolfram Mathworld definition

### Questions (26)

 7 Algebraic proof that two statements of the fundamental theorem of algebra are equivalent 7 Can all trigonometric expressions be written in terms of sine and cosine? 6 Why are rational functions called “rational”? 5 Integral calculus analog to the difference quotient 5 Can the Riemann Explicit Formula be used to find prime numbers?

### Tags (74)

 10 algebra-precalculus × 9 4 radicals × 2 9 calculus × 12 4 graphing-functions 6 factoring × 4 3 exponentiation × 3 5 trigonometry × 8 3 abstract-algebra × 2 4 functions × 2 3 factorial

### Bookmarks (71)

 241 Really advanced techniques of integration (definite or indefinite) 133 The Best of Dover Books (a.k.a the best cheap mathematical texts) 108 Least prime of the form $38^n+31$ 53 Is there an equation to describe regular polygons? 51 What book can “bridge” high school math and the more advanced topics?