Hi, I've got this:(adsbygoogle = window.adsbygoogle || []).push({});

$$\sin{(A*B)}\approx \frac{Si(B^2)-Si(A^2)}{2(\ln{B}-ln{A})}$$, whenever the RHS is defined and B is close to A ( I don't know how close).

Here ##Si(x)## is the integral of ##\frac{\sin{x}}{x}##

But, to check it, I need to evaluate the ##Si(x)## function. I'm new with Taylor series, so, how am I supposed to do it? The only confusion is that should I work with the Taylor series of ##Si(x)## around ##x=A^2## or ##x=B^2## to check it? How do I evaluate ##Si(B^2)-Si(A^2)## approximately?

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# I Expression of ##sin(A*B)##

Have something to add?

Draft saved
Draft deleted

Loading...

Similar Threads - Expression ##sin | Date |
---|---|

I Correct notation for some functional expressions | Feb 17, 2018 |

B Expressions of ##log(a+b), tan^{-1}(a+b),sin^{-1}(a+b)##,etc | Feb 20, 2017 |

B Why can't sin(x^2) be expressed in terms of sin(x)? | Sep 27, 2016 |

Trying to figure out a single variable expression for Sin | Jun 6, 2012 |

**Physics Forums - The Fusion of Science and Community**